H. Yamada, S. Dhongade, Y. Toyosaki, H. Matsuzaki, A. Sawa, "Electroresistance in all-oxide RuO2/Hf0.5Zr0.5O2/ITO ferroelectric tunnel junctions", ACS Appl. Electron. Mater., in press (2024).
T. Ito, Y. Tomioka, F. Rackerseder, M. Traub, D. Hoffmann, "Growth of β-Ga2O3 crystal with a diameter of 30 mm by laser-diode-heated floating zone (LDFZ) method", J. Cryst. Growth 634, 127673 (2024).
[FY2023]
S. Dhongade, H. Yamada, A. Sawa, H. Matsuzaki, "Optical Second harmonic generation on polarization-reversal for ferroelectric Hf0.5Zr0.5O2 capacitors", ACS Appl. Electron. Mater. 6, 1292-1298 (2023).
A. Jaoui, S. Jiang, X. Li, Y. Tomioka, I. H. Inoue, J. Engelmayer,R. Sharma, L. Paetzold, T. B. Fauque, "Lorenz Glasslike thermal conductivity and narrow insulating gap of EuTiO3", Phys. Rev. Mater. 7, 094604 (2023).
T. Ogasawara, "Time-Resolved Vector-Field Imaging of Spin-Wave Propagation in Permalloy Stripes Using Wide-Field Magneto-Optical Kerr Microscopy", Phys. Rev. Appl. 20, 024010 (2023).
H. Inoue, H. Tamura, A. Kitoh, X. Chen, Z. Byambadorj, T. Yajima, Y. Hotta, T. Iizuka, G. Tanaka, I. H. Inoue, "Long-time-constant leaky-integrating oxygen-vacancy drift-diffusion FET for human-interactive spiking reservoir computing",2023 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits)
[FY2022]
H. Yamada, Y. Toyosaki, A. Sawa, “Ferroelectricity and pseudo-coherent growth in HfO2/SrHfO3 nanolaminates", J. Appl. Phys. 133, 095301 (2023).
X. Chen, Z. Byambadorj, T. Yaima, H. Inoue, I. H. Inoue, and T. Iizuka, "CMOS-based area-and-power-efficient neuron and synapse circuits for time-domain analog spiking neural networks"，Appl. Phys. Lett. 122，074102 (2023).
E. Oishi, Y. Fujii, A. Koreeda, T. Satoh, and T. Ito, "Observation of quasi-elastic light scattering in BiFeO3". Jpn. J. Appl. Phys. 61 SN1021 (2022).
Y. Tomioka, N. Shirakawa, I. H. Inoue, "Superconductivity enhancement in polar metal regions of Sr0.95Ba0.05TiO3 and Sr0.985Ca0.015TiO3 revealed by systematic Nb doping"，npj Quantum Materials，7，111、(2022).
D.M. Pajerowski, J.S. Helton, V.O. Garlea, Y. Tomioka, Y. Tokura, "High resolution ferromagnetic and antiferromagnetic correlations in La0.7Ca0.3MnO3", Journal of Magnetism and Magnetic Materials" 561, 169740 (2022).
K. Shibuya and A. Sawa, "Epitaxial growth and polarized Raman scattering of niobium dioxide films", AIP ADVANCES, 12, 055103 (2022).
D. Zhang, S. Dissanayake, B. Winn, M. Matsuda, T. Ito, and R. Fishman, "Anisotropic spin-wave excitations in multiferroic BiFeO3", Phys. Rev. B105, 144426 (2022).
[FY2021]
Y. Nii, Y. Hirokane, S. Nakamura, S. Kimura, Y. Tomioka, T. Nojima, and Y. Onose, “Elastic study of electric quadrupolar correlation in the paramagnetic state of a frustrated quantum magnet Tb2+dTi2-dO7”, Phys. Rev. B 105, 094414 (2022).
T. Ogasawara, A. Yamaguchi, “Observation of frequency dependent resonances in magnetic vortex core gyration using time-resolved magneto-optical Kerr microscope with pulsed semiconductor laser illumination”, Jpn. J. Appl. Phys. 61, 018001 (2022).
X. Chen, T. Yajima, I. H. Inoue, T. Iizuka, “An Ultra-Compact Leaky Integrate-and-Fire Neuron with Long and Tunable Time Constant Utilizing Pseudo Resistors for Spiking Neural Networks”, Jpn. J. Appl Phys. 61, SC1051 (2021).
D. G. Farkas, D. Szaller, I. Kezsmarki, U. Nagel, T. Room, L. Peedu, J. Viirok, J. S. White, R. Cubitt, T. Ito, R. S. Fishman, and S. Bordacs,“Selection rules and dynamic magnetoelectric effect of the spin waves in multiferroic BiFeO3”, Phys. Rev. B, 104, 174429 (2021).
M. Han, H. Inoue, S. Fang, C. John, L. Ye, M. K. Chan, D. Graf, T. Suzuki, M. P. Ghimire, W. J. Cho, E. Kaxiras,J. G. Checkelsky, “Evidence of two-dimensional flat band at the surface of antiferromagnetic kagome metal FeSn”, Nat. Commun. 12, 5345 (2021).
[FY2020]
Y. Tomioka, T. Ito, E. Maruyama, S. Kimura, and I. Shindo, . “Magnetic and electronic properties of single crystals of perovskite nickelate oxide LaNiO3 prepared by the laser diode floating zone method”, J. Phys. Soc. Jpn. 90, 034704-1~034704-5 (2021).
N. Sono, Y. Kinoshita, N. Kida, T. Ito, H. Okamoto, and T. Miyamoto, “Terahertz-Field-Induced Changes of Electronic States Associated with a Polarization Modulation in BiFeO3”, J. Phys. Soc. Jpn. 90, 033703 (2021).
R. Nakamura, S. Saegusa, N. Akamatsu, K. Yamada, T. Ogasawara, M. Oura, T. Ohkochi and A. Yamaguchi, “Direct observation of a magnetic domain change in Ni wire and film on a LiNbO3 substrate using X-ray magnetic circular dichroic photoemission electron microscopy”, JJAP 60, SBBC01 (2021).
M. Matsuda, S. E. Dissanayake, T. Hong, Y. Ozaki, T. Ito, M. Tokunaga, X. Liu, M. Barkowiak and O. Prokhnenko, “Magnetic field induced antiferromagnetic cone structure in multiferroic BiFeO3”, Phys. Rev. Mater. 4, 034412 (2020).
K. Shibuya, K. Ishii, Y. Atsumi, T. Yoshida, Y, Sakakibara, M. Mori, and A. Sawa,. “Switching dynamics of silicon waveguide optical modulator driven by photothermally induced metal Insulator transition of vanadium dioxide cladding layer”, Opt. Express. 28, 37188 (2020).
Y. Uemura, S. Arai, J. Tsutsumi, S. Matsuoka, H. Yamada, R. Kumai, S. Horiuchi, A. Sawa, T. Hasegawa,"Ferroelectrics field modulation imaging: A useful technique for domain and domain-wall observations", Ferroelectrics 556, 37 (2020).
P. Khan, M. Kanamaru, K. Matsumoto, T. Ito, and T. Satoh, “Ultrafast light-driven simultaneous excitation of coherent terahertz magnons and phonons in multiferroic BiFeO3”, Phys. Rev. B 101, 134413 (2020).
T. Matsumae, Y. Kurashima, H. Takagi, H. Umezawa, K. Tanaka, T. Ito, H. Watanabe, and E. Higurashi, “Low-temperature direct bonding of β-Ga2O3 and diamond substrates under atmospheric conditions”, Appl. Phys. lett. 116, 141602 (2020).
T. Matsumae, Y. Kurashima, H. Takagi, H. Umezawa, K. Tanaka, T. Ito, H. Watanabe, and E. Higurashi, “Hetero-integration of β-Ga2O3 and Diamond substrates by hydrophilic bonding technique”, ECS Trans. 98, 17 (2020).
T. Room, J. Viirok, L. Peedu, U. Nagel, D. G. Farkas, D. Szaller, V. Kocsis, S. Bordacs, Kezsmarki, D. L. Kamenskyi, H. Engelkamp, M. Ozerov, D. Smirnov, J. Krzystek, K. Thirunavukkuarasu, Y. Ozaki, Y. Tomioka, T. Ito, T. Datta, and R. S. Fishman, “Magnetoelastic distortion of multiferroic BiFeO3 in the canted antiferromagnetic state”, Phys. Rev. B 102, 214410 (2020).
K. Matsuura, H. Oike, V. Koscis, T. Sato, Y. Tomioka, Y. Kaneko, M. Nakamura, Y. Taguchi, M. Kawasaki, Y. Tokura, and F. Kagawa, “Kinetic pathway facilitated by phase competition to metastable electronic phase”, Phys. Rev. B 103, L041106-1~L041106-5 (2020).
[2019]
T. Ito, Y. Ozaki, and Y. Tomioka, “Purification of β-Ga2O3 crystals by the zone refining”, Jpn. J. Appl. Phys. 58, 110908 (2019).
Y. Tomioka, Y. Ozaki, H. Inaba, and T. Ito, “Compensation effects between impurity cations in single crystals of a wide gap semiconductor β-Ga2O3 prepared by the floating zone method”, Jpn. J. Appl. Phys. 58, 091009 (2019).
T. Terashige, T. Ono, T. Miyamoto, T. Morimoto, H. Yamakawa, N. Kida, T. Ito, T. Sasagawa, T. Tohyama, and H. Okamoto, “Doublon-holon pairing mechanism via exchange interaction in two-dimensional cuprate Mott insulators”, Sci. Adv. 5, eaav2187 (2019).
S. Kawachi, S. Miyahara, T. Ito, A. Miyake, N. Furukawa, J. Yamaura, and M. Tokunaga, “Direct coupling of ferromagnetic moment and ferroelectric polarization in BiFeO3”, Phys. Rev. B 100, 140412(R) (2019).
M. Matsuda, J. Ma, V. O. Garlea, T. Ito, H. Yamaguchi, K. Oka, S.-L. Drechsler, R. Yadav, L. Hozoi, H. Rosner, R. Schumann, R. O. Kuzian and S. Nishimoto, “Highly dispersive magnons with spin-gap-like features in the frustrated ferromagnetic S=1/2 chain compound Ca2Y2Cu5O10 detected by inelastic neutron”,Phys. Rev. B 100, 104415 (2019).
Y. Hirokane, Y. Nii, Y. Tomioka, and Y. Onose, "Phononic thermal Hall effect in diluted terbium oxides”, Phys. Rev. B 99, 134419 (2019).
R. Nakamura, S. Saegusa, S. Suzuki, A. Nakao, Y. Utsumi, T. Ohkochi, M. Oura, Y. Takizawa, T. Saiki, Taekhyeon Lee, Kab-Jin Kim, Keisuke Yamada, T. Ogasawara, and A. Yamaguchi, "Magnetic Scattering in Ni Wires Fabricated on Ferroelectric LiNbO3 Substrate for Magnetic Sensor Application", Sensors and Materials 31, 3007(2019).
P. Stoliar, H. Yamada, Y. Toyosaki, A. Sawa, "Spike-shape dependence of the spike-timing dependent synaptic plasticity in ferroelectric-tunnel-junction synapses", Scientific Reports 9, 17740(2019).
Y. Tomioka, N. Shirakawa, K. Shibuya, and I. H. Inoue, “Enhanced superconductivity close to a non-magnetic quantum critical point in electron-doped strontium titanate”, Nature Communications 10, 738 (2019).
A. Yamaguchi, K. Yamada, A. Nakao, T. Saiki, Y. Utsumi, and T. Ogasawara, “The Study on Magnetization Reversal of Stripe-Domain Structure in Ni Wires Fabricated on a LiNbO3 Substrate”, IEEE Transactions on Magnetics 55, 22500404 (2019).
K, Shibuya, Y. Atsumi, T. Yoshida, Y. Sakakibara, M. Mori, and A. Sawa, “Silicon waveguide optical modulator driven by metal-insulator transition of vanadium dioxide cladding layer”, Optics Express 27, 4147 (2019).
K. Yahata, Y. Matsuzaki, S. Saito, H. Watanabe, and J. Ishi-Hayase, “Demonstration of vector magnetic field sensing by simultaneous control of nitrogen vacancy centers in diamond using multifrequency microwave pulses”, Applied Physics Letters 114, 022404 (2019).
Y. Uemura, S. Arai, J. Tsutsumi, S. Matsuoka, H. Yamada, R. Kumai, S. Horiuchi, A. Sawa, and T. Hasegawa, “Field-Modulation Imaging of Ferroelectric Domains in Molecular Single-Crystal Films”, Physical Review Applied 11, 014046 (2019).
[2018]
H. Nakao, C. Tabata, Y. Murakami, Y. Yamasaki, H. Yamada, S. Ishihara, and M. Kawasaki, “Charge disproportionation of Mn 3d and O 2p electronic states depending on strength of p-d hybridization in (LaMnO3)2(SrMnO3)2 superlattices”, Physical Review B 98, 245146 (2018).
T. Miyamoto, Y. Matsui, T. Terashige, T. Morimoto, N. Sono, H. Yada, S. Ishihara, Y. Watanabe, S. Adachi, T. Ito, K. Oka, A. Sawa, and H. Okamoto, “Probing ultrafast spin-relaxation and precession dynamics in a cuprate Mott insulator with seven-femtosecond optical pulses”, Nature Communications 9, 3948 (2018).
T. Ishikawa, A. Yoshizawa, S. Kashiwaya, Y. Mawatari, and H. Watanabe, “Influence of Dynamical Decoupling Sequences with Finite-Width Pulses on Quantum Sensing for AC Magnetometry”, Physical Review Applied 10, 054059 (2018).
H. Yamada, Y. Toyosaki, and A. Sawa, “Growth and ferroelectric properties of yttrium-doped hafnium oxide/indium-tin oxide polycrystalline heterostructures with sharp and uniform interfaces”, Journal of Applied Physics 124, 105305 (2018).
K. Adachi, H. Ogi, N. Takeuchi, N. Nakamura, H. Watanabe, T. Ito, and Y. Ozaki, “Unusual elasticity of monoclinic β-Ga2O3”, Journal of Applied Physics 124, 085102 (2018).
Y. Tomioka, T. Ito, and A. Sawa, “Magnetotransport Properties of Eu1-xLaxTiO3 (0 < x < 0.07) Single Crystals”, Journal of the Physical Society of Japan 87, 094716 (2018).
S. Saijo, Y. Matsuzaki, S. Saito, T. Yamaguchi, I. Hanano, H. Watanabe, N. Mizuochi, and J. Ishi-Hayase, “AC magnetic field sensing using continuous-wave optically detected magnetic resonance of nitrogen-vacancy centers in diamond”, Applied Physics Letters 113, 082405 (2018) .
N. Ghenzi, M. Rozenberg, L. Pietrobon, R. Llopis, R. Gay, M. Beltrán, M. Knez,
L. Hueso, and P. Stoliar, “One-transistor one-resistor (1T1R) cell for large-area electronics”, Applied Physics Letters 113, 072108 (2018).
T. Unden, N. Tomek, T. Weggler, F. Frank, P. London, J. Zopes, C. Degen, N. Raatz, J. Meijer, H. Watanabe, K. M. Itoh, M. B. Plenio, B. Naydenov, and F. Jelezko, “Coherent control of solid state nuclear spin nano-ensembles”, npj Quantum Information 4, 39 (2018).
R. O. Kuzian, R. Klingeler, W. E. A. Lorenz, N. Wizent, S. Nishimoto, U. Nitzsche, H. Rosner, D. Milosavljevic, L. Hozoi, R. Yadav, J. Richter, A. Hauser, J. Geck, R. Hayn, V. Yushankhai, L. Siurakshina, C. Monney, T. Schmitt, J. Thar, G. Roth, T. Ito, H. Yamaguchi, M. Matsuda, S. Johnston, J. Málek, and S.-L. Drechsler, “Comment on ‘Oxygen vacancy-induced magnetic moment in edge-sharing CuO2 chains of Li2CuO2’”, New Journal of Physics 20, 058001 (2018).
S. Bordács, D. G. Farkas, J. S. White, R. Cubitt, L. DeBeer-Schmitt, T. Ito, and I. Kézsmárki, “Magnetic Field Control of Cycloidal Domains and Electric Polarization in Multiferroic BiFeO3”, Physical Review Letters 120, 147203 (2018).
Y. Ishii, R. Sasaki, Y. Nii, T. Ito, and Y. Onose, “Magnetically Controlled Surface Acoustic Waves on Multiferroic BiFeO3”, Physical Review Applied 9, 034034 (2018).
Y. Tomioka, T. Ito, and A. Sawa, “Electronic phase diagram of half-doped perovskite manganites on the plane of quenched disorder versus one-electron bandwidth”, Physical Review B 97, 014409 (2018).
[2017]
T. Tanigaki, T. Akashi, A. Sugawara, K. Miura, J. Hayakawa, K. Niitsu, T. Sato, X. Yu, Y. Tomioka, K. Harada, D. Shindo, Y. Tokura, and H. Shinada, “Magnetic field observations in CoFeB/Ta layers with 0.67-nm resolution by electron holography”, Scientific Reports 7, 16598 (2017) .
P. Stoliar, A. Schulman, A. Kitoh, A. Sawa, and I. H. Inoue,“STDP synapse with outstanding stability based on a novel insulator-to-metal transition FET”, Technical Digest of the 2017 IEEE International Electron Devices Meeting (IEDM), pp. 808-811.
S. Kawachi, A. Miyake, T. Ito, S. E. Dissanayake, M. Matsuda, W. Ratcliff II, Z. Xu, Y. Zhao, S. Miyahara, N. Furukawa, and M. Tokunaga,“Successive field-induced transitions in BiFeO3 around room temperature”, Physical Review Materials 1, 024408 (2017).
T. Ogasawara,“Improvement in spatial frequency characteristics of magneto-optical Kerr microscopy”, Japanease Journal of Applied Physics 56, 108002 (2017).
K. Shibuya and A. Sawa,“Raman scattering of epitaxial vanadium dioxide films with low-temperature monoclinic phase”, Journal of Applied Physics 122, 015307 (2017).
K. Ito, H. Saito, K. Sasaki, H. Watanabe, T. Teraji, K. M. Itoh, and E. Abe,“Nitrogen-vacancy centers created by N+ ion implantation through screening SiO2 layers on diamond”, Applied Physics Letters 110, 213105 (2017).
K. Sasaki, Ed E. Kleinsasser, Z. Zhu, W.-D. Li, H. Watanabe, K.-M. C. Fu, K. M. Itoh, and E. Abe, “Dynamic nuclear polarization enhanced magnetic field sensitivity and decoherence spectroscopy of an ensemble of near-surface nitrogen-vacancy centers in diamond”, Applied Physics Letters 110, 192407 (2017).
X. Y. Tee, T. Ito, T. Ushiyama, Y. Tomioka, I. Martin, and C. Panagopoulos, “Two superconducting transitions in single-crystal La2-xBaxCuO4”, Physical Review B 95, 054516 (2017).
A. Schulman, A. Kitou, P. Stoliar, and I. H. Inoue, “Sign changing non-monotonic voltage-gain of HfO2/Parylene-C/SrTiO3 field-effect transistor due to a percolative insulator to two-dimensional metal transition”, Applied Physics Letters 110, 013502 (2017).
[2016]
T. Shimaoka, J. H. Kaneko, Y. Sato, M. Tsubota, H. Shimmyo, A. Chayahara, H. Watanabe, H. Umezawa, and Y. Mokuno, “Fano factor evaluation of diamond detectors for alpha particles”, Physica Status Solidi (a) 213, 2629 (2016).
K. Shibuya and A. Sawa, “Electrolyte gating on oxygen-deficient VO2 thin films”, Journal of Nanoelectronics and Optoelectronics 5, 571 (2016).
Y. J. Kim, H. Yamada, T. Moon, Y. J. Kwon, C. H. An, H. J. Kim, K. D. Kim, Y. H. Lee, S. D. Hyun, M. H. Park, and C. S. Hwang, “Time-Dependent Negative Capacitance Effects in Al2O3/BaTiO3 Bilayers”, Nano Letters 16, 4375 (2016).
Y. Matsui, T. Terashige, R. Uchida, T. Miyamoto, H. Yada, H. Matsuzaki, B. -S. Li, A. Sawa, and H. Okamoto, “Intrinsic carrier scattering mechanism in anatase TiO2 investigated by ultraviolet-pump terahertz-probe spectroscopy”, Physical Review B 94, 041113(R) (2016).
K. Sasaki, Y. Monnai, S. Saijo, R. Fujita, H. Watanabe, J. Ishi-Hayase, K. M. Itoh, and E. Abe, “Broadband, large-area microwave antenna for optically-detected magnetic resonance of nitrogen-vacancy centers in diamond”, Review of Scientific Instruments 8, 053904 (2016).
H. Watanabe, H. Umezawa, T. Ishikawa, K. Kaneko, S. Shikata, J. Ishi-Hayase, K. M. Itoh, “Formation of Nitrogen-Vacancy Centers in Homoepitaxial Diamond Thin Films Grown via Microwave Plasma-Assisted Chemical Vapor Deposition”, IEEE Transactions on Nanotechnology 15, 614 (2016).
S. S. Sunku, T.Kong, T. Ito, P. C. Canfield, B. S. Shastry, P. Sengupta, and C. Panagopoulos, “Hysteretic magnetoresistance and unconventional anomalous Hall effect in the frustrated magnet TmB4”, Physical Review B 93, 174408 (2016).
E. E. Kleinsasser, M. M. Stanfield, J. K. Q. Banks, Z. Zhu, W.-D. Li, V. M. Acosta, H. Watanabe, K. M. Itoh, and K.-M. C. Fu, “High density nitrogen-vacancy sensing surface created via He+ ion implantation of 12C diamond”, Applied Physics Letters 108, 202401 (2016).
N. Kumar, A. Kitoh, and I. H. Inoue, “Anomalous enhancement of the
sheet carrier density beyond the classic limit on a SrTiO3 surface”, Scientific Reports 6, 25789 (2016).
K. Miyazaki, K. Shibuya, M. Suzuki, K. Sakai, J. Fujita, and A. Sawa, “Chromium-niobium co-doped vanadium dioxide films: large temperature coefficient of resistance and practically no thermal hysteresis of the metal-insulator transition”, AIP Advances 6, 055012 (2016).
S. Kawachi, H. Kuroe, T. Ito, A. Miyake, and M. Tokunaga, “Resistive memory effects in BiFeO3 single crystals controlled by transverse electric fields”, Applied Physics Letters 108, 162903 (2016).
H. Yamada, Y. Toyosaki, and A. Sawa, “Coherent Epitaxy of a Ferroelectric Heterostructure on a Trilayered Buffer for Integration into Silicon”, Advanced Electronic Materials 2, 201500334 (2016).
A. Soumyanarayanan, X. Y. Tee, T. Ito, T. Ushiyama, Y. Tomioka, and C. Panagopoulos, “Multiple broken symmetries in striped La2-xBaxCuO4 detected by the field-symmetric Nernst effect”, Physical Review B 93, 054512 (2016).
H. Yada, Y. Ijiri, H. Uemura, Y. Tomioka, and H. Okamoto, “Enhancement of Photoinduced Charge-Order Melting via Anisotropy Controlby Double-Pulse Excitation in Perovskite Manganites: Pr0.6Ca0.4MnO3”, Physical Review Letters 116, 076402 (2016).
S. Mukherjee, H. Watanabe, D. Isheim, D. N. Seidman, and O. Moutanabbir, “Laser-Assisted Field Evaporation and Three-Dimensional Atom-by-Atom Mapping of Diamond Isotopic Homojunctions”, Nano Letters 16, 1335 (2016).
T. Shimaoka, J. H. Kaneko, K. Ochiai, M. Tsubota, H. Shimmyo, A. Chayahara, H. Umezawa, H. Watanabe, S. Shikata, M. Isobe, and M. Osakabe, “A diamond 14 MeV neutron energy spectrometer with high energy resolution”, Review of Scientific Instruments 87, 023503 (2016).
K. Shibuya and A. Sawa, “Modulation of Metal-Insulator Transition in VO2 by Electrolyte Gating-Induced Protonation”, Advanced Electronic Materials 2, 1500131 (2016).
Y.-J. Kim, M.-H. Park, Y.-H. Lee, H.-J. Kim, W. Jeon, T. Moon, K.-D. Kim, D.-S. Jeong, H. Yamada, and C.-S. Hwang, “Frustration of Negative Capacitance in Al2O3/BaTiO3 Bilayer Structure”, Scientific Reports 6, 19039 (2016).
Y. Hirokane, Y. Tomioka, Y. Imai, A. Maeda, and Y. Onose, “Longitudinal and transverse thermoelectric transport in MnSi”, Physical Review B 93, 014436 (2016).
[2015]
K. Naruse, T. Kawamata, M. Ohno, Y. Matsuoka, M. Hase, H. Kuroe, T. Sekine, K. Oka, T. Ito, H. Eisaki, T. Sasaki, and Y. Koike, “Magnetic State of the Geometrically Frustrated Quasi-One-Dimensional Spin System Cu3Mo2O9 Studied by Thermal Conductivity”, Journal of the Physical Society of Japan 84, 124601 (2015).
H. Nakao, T. Sudayama, M. Kubota, J. Okamoto, Y. Yamasaki, Y. Murakami, H. Yamada, A. Sawa, and K. Iwasa, “Magnetic and electronic states in (LaMnO3)2(SrMnO3)2 superlattice exhibiting a large negative magnetoresistance”, Physical Review B 92, 245104 (2015).
K. Wierschem, S. S. Sunku, T. Kong, T. Ito, P. C. Canfield, C. Panagopoulos, and P. Sengupta, “Origin of modulated phases and magnetic hysteresis in TmB4”, Physical Review B 92, 214433 (2015).
L. Liu, A. Tsurumaki-Fukuchi, H. Yamada, and A. Sawa, “Ca doping dependence of resistive switching characteristics in ferroelectric capacitors comprising Ca-doped BiFeO3”, Journal of Applied Physics 118, 204014 (2015).
M. C. Langner, S. Zhou, G. Coslovich, Y.-D. Chuang, Y. Zhu, J. S. Robinson, W. F. Schlotter, J. J. Turner, M. P. Minitti, R. G. Moore, W. S. Lee, D. H. Lu, D. Doering, P. Denes, Y. Tomioka, Y. Tokura, R. A. Kaindl, and R. W. Schoenlein “Ultrafast x-ray and optical signatures of phase competition and separation underlying the photoinduced metallic phase in Pr1-xCaxMnO3”, Physical Review B 92, 155148 (2015).
Z. Viskadourakis, S. S. Sunku, S. Mukherjee, B. M. Andersen, T. Ito, T. Sasagawa, and C. Panagopoulos, “Ferroelectricity in underdoped La-based cuprates”, Scientific Reports 5, 15268 (2015).
K. Shibuya and A. Sawa, “Optimization of conditions for growth of vanadium dioxide thin films on silicon by pulsed-laser deposition”, AIP Advances 5, 107118 (2015).
B.-S. Li, Y. Matsui, T. Miyamoto, H. Yada, A. Sawa, and H. Okamoto, “Epitaxial growth of high quality La2CuO4 film on LaSrAlO4 substrate with introduction of ultrathin amorphous layer of La2CuO4”, Journal of Crystal Growth 425, 230 (2015).
K. Miyazaki, K. Shibuya, M. Suzuki, H. Wado, and A. Sawa, “High temperature coefficient of resistance of low-temperature-grown VO2 films on TiO2-buffered SiO2/Si (100) substrates”, Journal of Applied Physics 118, 055301 (2015).
E. Matsubara, T. Mochizuki, M. Nagai, T. Ito, and Masaaki Ashida, “Ultrafast near-infrared nonlinear absorption in a multiferroic single crystal of bismuth ferrite”, Japanese Journal of Applied Physics 54, 092201 (2015).
M. Nakano, D. Okuyama, K. Shibuya, M. Mizumaki, H. Ohsumi, M. Yoshida, M. Takata, M. Kawasaki, Y. Tokura, T. Arima and Y. Iwasa, “Distinct substrate effect on the reversibility of the metal-insulator transitions in electrolyte-gated VO2 thin films”, Advanced Electronic Materials 1, 1500093 (2015).
M. Tokunaga, M. Akaki, A. Miyake, T. Ito, and H. Kuwahara, “High field studies on BiFeO3 single crystals grown by the laser-diode heating floating zone method”, Journal of Magnetism and Magnetic Materials 383, 259 (2015).
H. Yamada, A. Tsurumaki-Fukuchi, M. Kobayashi, T. Nagai, Y. Toyosaki, H. Kumigashira, and A. Sawa, “Strong Surface-Termination Effect on Electroresistance in Ferroelectric Tunnel Junctions”, Advanced Functional Materials 25, 2708 (2015).
M. Tsubota, J. H. Kaneko, D. Miyazaki, T. Shimaoka, K. Ueno, T. Tadokoro, A. Chayahara, H. Watanabe, Y. Kato, S. Shikata, and H. Kuwabara, “High-temperature characteristics of charge collection efficiency using single CVD diamond detectors”, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 789, 50 (2015).
S. Kajita, M. Tohyama, H. Washizu, T. Ohmori, H. Watanabe, and S. Shikata, “Friction Modification by Shifting of Phonon Energy Dissipation in Solid Atoms”, Tribology Online 10, 156 (2015).
M. Marinova, J. E. Rault, A. Gloter, S. Nemsak, G. K. Palsson, J.-P. Rueff, C. S. Fadley, C. Carretero, H. Yamada, K. March, V. Garcia, S. Fusil, A. Barthelemy, O. Stephan, C. Colliex, and M. Bibes, “Depth Profiling Charge Accumulation from a Ferroelectric into a Doped Mott Insulator”, Nano Letters 15, 2533 (2015).
D. Okuyama, K. Shibuya, R. Kumai, Y. Kitagawa, T. Suzuki, Y. Yamasaki, H. Nakao, Y. Murakami, M. Kawasaki, Y. Taguchi, T. Arima, and Y. Tokura, “X-ray study of metal-insulator transitions induced by W-doping and photoirradiation in VO2 films”, Physical Review B 91, 064101 (2015).
H. Matsuzaki, H. Nishioka, H. Uemura, A. Sawa, S. Sota, T. Tohyama, and H. Okamoto, “Ultrafast charge and lattice dynamics in one-dimensional Mott insulator of CuO-chain compound Ca2CuO3 investigated by femtosecond absorption spectroscopy”, Physical Review B 91, 081114(R) (2015).
Y. Tomioka, T. Ito, and A. Sawa, “Evolutions of metallic ferromagnetism and magnetotransport properties of La1-xBaxMnO3 single crystals with 0 < x < 0.5”, Journal of the Physical Society of Japan 84, 024703 (2015).
J. A. Schneeloch, Z. Xu, J. Wen, P. Gehring, C. Stock, M. Matsuda, B. Winn, G. Gu, S. M. Shapiro, R. J. Birgeneau, T. Ushiyama, Y. Yanagisawa, Y. Tomioka, T. Ito, and G. Xu, “Neutron inelastic scattering measurements on low-energy phonons in the multiferroic BiFeO3”, Physical Review B 91, 064301 (2015).
M. Tokunaga, M. Akaki, T. Ito, S. Miyahara, A. Miyake, H. Kuwahara, and N. Furukawa, “Magnetic control of transverse electric polarization in BiFeO3”, Nature Communications 6, 5878 (2015).
[2014]
T. Yoshida, S. Ideta, T. Shimojima, W. Malaeb, K. Shinada, H. Suzuki, I. Nishi, A. Fujimori, K. Ishizaka, S. Shin, Y. Nakashima, H. Anzai, M. Arita, A. Ino, H. Namatame, M. Taniguchi, H. Kumigashira, K. Ono, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, H. Ikeda, R. Arita, T. Saito, S. Onari, and H. Kontani, “Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)2”, Scientific Reports 4, 7292 (2014).
K. Ito and Y. Watanabe, “Isotope engineering of silicon and diamond for quantum computing and sensing applications”, MRS Communications 4, 143 (2014).
I. H. Inoue, “Two-dimensional quantum transport: Tunnel vision”, Nature Physics 10, 705 (2014).
M. Nakajima, S. Ishida, T. Tanaka, K. Kihou, Y. Tomioka, T. Saito, C.-H. Lee, H. Fukazawa, Y. Kohori, T. Kakeshita, A. Iyo, T. Ito, H. Eisaki, and S. Uchida, “Strong Electronic Correlations in Iron Pnictides: Comparison of Optical Spectra for BaFe2As2-Related Compounds”, Journal of the Physical Society of Japan 83, 104703 (2014).
E. Miranda, D. Jimenez, A. Tsurumaki-Fukuchi, J. Blasco, H. Yamada, J. Sune, and A. Sawa, “Modeling of hysteretic Schottky diode-like conduction in Pt/BiFeO3/SrRuO3 switches”, Applied Physics Letters, 105, 082904 (2014).
M. Nakajima, S. Ishida, T. Tanaka, K. Kihou, Y. Tomioka, T. Saito, C. H. Lee, H. Fukazawa, Y. Kohori, T. Kakeshita, A. Iyo, T. Ito, H. Eisaki, and S. Uchida, “Normal-state charge dynamics in doped BaFe2As2: Roles of doping and necessary ingredients for superconductivity”, Scientific Reports 4, 5873 (2014).
G. Shibata, K. Yoshimatsu, E. Sakai, V. R. Singh, V. K. Verma, K. Ishigami, T. Harano, T. Kadono, Y. Takeda, T. Okane, Y. Saitoh, H. Yamagami, A. Sawa, H. Kumigashira, M. Oshima, T. Koide, and A. Fujimori, “Thickness-dependent ferromagnetic metal-to-paramagnetic insulator transition in La0.6Sr0.4MnO3 thin films studied by x-ray magnetic circular dichroism”, Physical Review B 89, 235123 (2014).
K. Miyazaki, K. Shibuya, M. Suzuki, H. Wado, and A. Sawa, “Correlation between thermal hysteresis width and broadening of metal-insulator transition in Cr and Nb doped VO2 films”, Japanese Journal of Applied Physics 53, 235123 (2014).
M. Tokunaga, M. Akaki, H. Kuwahara, T. Ito, A. Matsuo, and K. Kindo, “Magnetoelectric Effects in Mono-Domain Crystals of BiFeO3”, Journal of the Physical Society Conference Proceedings 3, 014038 (2014).
H. Kuroe, K. Aoki, R. Kino, T. Sato, H. Kuwahara, T. Sekine, T. Kihara, M. Akaki, Y. Kohama, M. Tokunaga, A. Matsuo, K. Kindo, M. Hase, K. Takehana, H. Kitazawa, K. Oka, T. Ito, and H. Eisaki, “Magnetic and Dielectric Properties in Multiferroic Cu3Mo2O9 under High Magnetic Fields”, Journal of the Physical Society Conference Proceedings 3, 014036 (2014).
T. Sato, K. Aoki, R. Kino, H. Kuroe, T. Sekine, M. Hase, K. Oka, T. Ito, and H. Eisaki“Raman Scattering in (Cu,Zn)3(Mo,W)2O9”, Journal of the Physical Society Conference Proceedings 3, 014035 (2014).
S. Ideta, T. Yoshida, M. Nakajima, W. Malaeb, H. Kito, H. Eisaki, A. Iyo, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, Y. Kotani, K. Ono, S. K. Mo, Z. Hussain, Z.-X. Shen, H. Harima, S. Uchida, and A. Fujimori, “Electronic structure of BaNi2P2 observed by angle-resolved photoemission spectroscopy”, Physical Review B 89, 195138 (2104).
T. Rosskoph, A. Dussaux, K. Ohashi, M. Loretz, R. Schirhagl, H. Watanabe, S. Shikata, K. M. Itoh, and C. L. Degen, “Investigation of Surface Magnetic Noise by Shallow Spins in Diamond”, Physical Review Letters 112, 147602 (2014).
M. Kubota, H. Yamada, H. Nakao, J. Okamoto, Y. Yamasaki, A. Sawa, and Y. Murakami,“Magnetic and electronic properties of (LaMnO3)5(SrMnO3)5 superlattice revealed by resonant soft X-ray scattering”, Japanese Journal of Applied Physics 53, 05FH07 (2014).
K. Shibuya and A. Sawa, “Epitaxial growth and structural transition of VO2/MgF2(001)”, Japanese Journal of Applied Physics 53, 05FF03 (2014).
S. Y. Zhou, M. C. Langner, Y. Zhu, Y.-D. Chuang, M. Rini, T. E. Glover, M. P. Hertlein, A.G. Cruz Gonzalez, N. Tahir, Y. Tomioka, Y. Tokura, Z. Hussain, and R. W. Schoenlein, “Glass-like recovery of antiferromagnetic spin ordering in a photo-excited manganite Pr0.7Ca0.3MnO3”, Scientific Reports, 4, 4050 (2014).
A. Tsurumaki-Fukuchi, H. Yamada, and A. Sawa, “Resistive switching characteristics in dielectric/ferroelectric composite devices improved by post-thermal annealing at relatively low temperature”, Applied Physics Letters, 104, 092903 (2014).
H. Nakao, H. Yamada, A. Sawa, K. Iwasa, J. Okamoto, T. Sudayama, Y. Yamasaki, and Y. Murakami, “Neutron magnetic scattering study in manganite thin film system”, Solid State Communications 185, 18-20 (2014).
S. Boyn, S. Girod, V. Garcia, S. Fusil, S. Xavier, C. Deranlot, H. Yamada, C. Carretero, E. Jacquet, M. Bibes, A. Barthelemy, and J. Grollier, “High-performance ferroelectric memory based on fully patterned tunnel junctions”, Applied Physics Letters, 104, 052909 (2014).
H. Matsuzaki, Y. Matsui, R. Uchida, H. Yada, T. Terashige, B.-S. Li, A. Sawa, M. Kawasaki, Y. Tokura, and H. Okamoto, “Photocarrier dynamics in anatase TiO2 investigated by pump-probe
absorption spectroscopy”, Journal of Applied Physics 115, 053514 (2014).
D. Okuyama, M. Nakano, S.Takeshita,H. Ohsumi,S. Tardif, K. Shibuya,T. Hatano,H. Yumoto,T. Koyama, H. Ohashi, M. Takata, M. Kawasaki, T. Arima,Y. Tokura, and Y. Iwasa, “Gate-tunable gigantic lattice deformation in VO2”, Applied Physics Letters 104, 023507 (2014).
T. Shimojima, T. Sonobe, W. Malaeb, K. Shinada, A. Chainani, S. Shin, T. Yoshida, S. Ideta, A. Fujimori, H. Kumigashira, K. Ono, Y. Nakashima, H. Anzai, M. Arita, A. Ino, H. Namatame, M. Taniguchi, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, K. Ohgushi, S. Kasahara, T. Terashima, H. Ikeda, T. Shibauchi, Y. Matsuda, and K. Ishizaka, “Pseudogap formation above the superconducting dome in iron pnictides”, Physical Review B 89, 045101 (2014).
[2013]
D. Jimenez, E. Miranda, A. Tsurumaki-Fukuchi, H. Yamada, J. Sune, and A. Sawa, “Multilevel recording in Bi-deficient Pt/BFO/SRO heterostructures based on ferroelectric resistive switching targeting high-density information storage in nonvolatile memories”, Applied Physics Letters 103, 263502 (2013).
H. Watanabe, T. Koretsune, S. Nakashima, S. Saito, and S. Shikata, “Isotope composition dependence of the band-gap energy in diamond”, Physical Review B 88, 205420 (2013).
T. Harano, G. Shibata, K. Yoshimatsu, K. Ishigami, V.K.Verma, Y. Takahashi, T. Kadono, T. Yoshida, A. Fujimori, T. Koide, F.-H. Chang, H.-J. Lin, D.-J. Huang, C.-T. Chen, P.-H. Xiang, H. Yamada, and A. Sawa, “Phase diagram of Ca1-xCexMnO3 thin films studied by x-ray magnetic circular dichroism”, Solid State Communications 174, 30 (2013).
M. Nakano, K. Shibuya, N. Ogawa, T. Hatano, M. Kawasaki, Y. Iwasa, and Y. Tokura, “Infrared-sensitive electrochromic device based on VO2”, Applied Physics Letters 103, 153503 (2013).
A. Tsurumaki-Fukuchi, H. Yamada, and A. Sawa, “Resistive switching artificially induced in a dielectric/ferroelectric composite diode”, Applied Physics Letters, 103, 152903 (2013).
T. Ito, T. Ushiyama, M. Aoki, Y. Tomioka, Y. Hakuta, H. Takashima, and R. Wang, “Oxygen diffusion and nonstoichiometry in BiFeO3”, Inorganic Chemistory 52, 12806 (2013).
K. Ohashi, T. Rosskopf, H. Watanabe, M. Loretz, Y. Tao, R. Hauert, S. Tomizawa, T. Ishikawa, J. Ishi-Hayase, S. Shikata, C. L. Degen, and K. M. Itoh, “Negatively Charged Nitrogen-Vacancy Centers in a 5 nm Thin 12C Diamond Film”, Nano Letters 13 4733 (2013).
H. Yamada, M. Marinova, P. Altuntas, A. Crassous, L. Begon-Lours, S. Fusil, E. Jacquet, V. Garcia, K. Bouzehouane, A. Gloter,
J. E. Villegas, A. Barthelemy, and Manuel Bibes, “Ferroelectric control of a Mott insulator”, Scientific Reports 3, 2834 (2013).
H. Yamada, V. Garcia, S. Fusil, S. Boyn, M. Marinova, A. Gloter, S. Xavier, J. Grollier, E. Jacquet, C. Carretero, C. Deranlot, M. Bibes, and A. Barthelemy, “Giant Electroresistance of Super-tetragonal BiFeO3-Based Ferroelectric Tunnel Junctions”, ACS Nano 7, 5385 (2013).
T. Harano, G. Shibata, K. Ishigami, Y. Takashashi, V. K. Verma, V. R. Singh, T. Kadono, A. Fujimori1, Y. Takeda, T. Okane, Y. Saitoh, H. Yamagami, T. Koide, H. Yamada, A. Sawa, M. Kawasaki, Y. Tokura, and A. Tanaka, “Role of doped Ru in coercivity-enhanced La0.6Sr0.4MnO3 thin film studied by x-ray magnetic circular dichroism”, Applied Physics Letters 102, 222404 (2013).
K. Shibuya, J. Tsutsumi, T. Hasegawa, and A. Sawa, “Fabrication and Raman scattering study of epitaxial VO2 films on MgF2 (001) substrates”, Applied Physics Letters 103, 021604 (2013).
S. Ideta, T. Yoshida, M. Nakajima, W. Malaeb, T. Shimojima, K. Ishizaka, A. Fujimori, H. Kimigashira, K. Ono, K. Kihou, Y. Tomioka, C. H. Lee, A. Iyo, H. Eisaki, T. Ito, and S. Uchida, “Effects of Zn substitution on the electronic structure of BaFe2As2 revealed by angle-resolved photoemission spectroscopy”, Physical Review B 87, 201110 (2013).
S. Ishida, M. Nakajima, T. Liang, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Kakeshita, Y. Tomioka, T. Ito, and S. Uchida, “Anisotropy of the In-Plane Resistivity of Underdoped Ba(Fe1-xCox)2As2 Superconductors Induced by Impurity Scattering in the Antiferromagnetic Orthorhombic Phase”, Physical Review Letters 110, 207001 (2013).
A. B. Eyvazov, I. H. Inoue, P. Stoliar, M. J. Rozenberg, C. Panagopoulos, “Enhanced and continuous electrostatic carrier doping on the SrTiO3 surface”, Scientific Reports 3, 1721 (2013).
P.-H. Xiang, S. Asanuma, H. Yamada, H. Sato, I. H. Inoue, H. Akoh, A. Sawa, M. Kawasaki, and Y. Iwasa, “Electrolyte-Gated SmCoO3 Thin-Film Transistors Exhibiting Thickness-Dependent Large Switching Ratio at Room Temperature”, Advanced Materials 25, 2158 (2013).
M. Kubota, K. Shibuya, Y. Tokunaga, F. Kagawa, A. Tsukazaki, Y. Tokura, and M. Kawasaki, “Systematic control of stress-induced anisotropy in pseudomorphic iron garnet thin films”, J. Magn. Magn. Mater. 339, 63 (2013).
K. Fang, V. M. Acosta, C. Santori, Z. Huang, K. M. Itoh, H. Watanabe, S. Shikata, and R. G. Beausoleil, “High-Sensitivity Magnetometry Based on Quantum Beats in Diamond Nitrogen-Vacancy Centers”, Physics Review Letters 110, 130802 (2013).
B.-S. Li, A. Sawa, H. Okamoto, “Fermi level shift in La2-xSrxCuO4 probed by heteroepitaxial junctions with Nb-doped SrTiO3”, Applied Physics Letters 102, 111606 (2013).
S. Ideta, T. Yoshida, I. Nishi, A. Fujimori, Y. Kotani, K. Ono, Y. Nakashima, S. Yamaichi, T. Sasagawa, M. Nakajima, K. Kihou, Y. Tomioka, C. H. Lee, A. Iyo, H. Eisaki, T. Ito, S. Uchida, and R. Arita, “Dependence of carrier doping on the impurity potential in transition-metal-substituted FeAs-based superconductors”, Physical Review Letters 110, 107007 (2013).
S. Ishida, M. Nakajima, T. Liang, K. Kihou, C.-H. Lee, A. Iyo, H. Eisaki, T. Kakeshita, Y. Tomioka, T. Ito, and S. Uchida, “Effect of Doping on the Magnetostructural Ordered Phase of Iron Arsenides: A Comparative Study of the Resistivity Anisotropy in Doped BaFe2As2 with Doping into Three Different Sites”, Journal of The American Chemical Society 135, 3158 (2013).
A. P. Petrovic, Y. Kato, S. S. Sunku, T. Ito, P. Sengupta, L. Spalek, M. Shimuta, T. Katsufuji, C. D. Batista, S. S. Saxena, and C. Panagopoulos, “Electric Field Modulation of the Tetragonal Domain Orientation Revealed in the Magnetic Ground State of Quantum Paraelectric EuTiO3”, Physical Review B 87, 064103 (2013).
T. Ito, T. Ushiyama, Y. Yanagisawa, Y. Tomioka, I. Shindo, and A. Yanase, “Laser-diode-heated floating zone (LDFZ) method appropriate to crystal growth of incongruently melting materials”, Journal of Crystal Growth 363, 264 (2013).
[2012]
P.-H. Xiang, H. Yamada, H. Akoh, and A. Sawa, “Phase diagrams of strained Ca1-xCexMnO3 films”, Journal of Applied Physics 112, 113703 (2012).
M. Nakajima, S. Ishida, Y. Tomioka, K. Kihou, C. H. Lee, A. Iyo, T. Ito, T. Kakeshita, H. Eisaki, and S. Uchida, “Effect of Co Doping on the In-Plane Anisotropy in the Optical Spectrum of Underdoped Ba(Fe1-xCox)2As2”, Phyiscal Review Letters 109, 217003 (2012).
A. Chanthbouala, V. Garcia, R. O. Cherifi, K. Bouzehouane, S. Fusil, X. Moya, S. Xavier, H. Yamada, C. Deranlot, N. D. Mathur, M. Bibes, A. Barthelemy and J. Grollier, “A ferroelectric memristor”, Nature Materials 11, 860 (2012).
R. O. Kuzian, S. Nishimoto, S.-L. Drechsler, J. Malek, S. Johnston, Jeroen van den Brink, M. Schmitt, H. Rosner, M. Matsuda, K. Oka, H. Yamaguchi, and T. Ito, “Ca2Y2Cu5O10: The first frustrated quasi-1D ferromagnet close to criticality”, Phyiscal Review Letters 109, 117207 (2012).
M. Matsuda, R. S. Fishman, T. Hong, C. H. Lee, T. Ushiyama, Y. Yanagisawa, Y. Tomioka, and T. Ito, “Magnetic Dispersion and Anisotropy in Multiferroic BiFeO3”, Phyiscal Review Letters 109, 067205 (2012).
L. Demko, S. Bordacs, T. Vojta, D. Nozadze, F. Hrahsheh, C. Svoboda, B. Dora, H. Yamada, M. Kawasaki, Y. Tokura, and I. Kezsmarki, “Disorder Promotes Ferromagnetism: Rounding of the Quantum Phase Transition in Sr1-xCaxRuO3”, Phyiscal Review Letters 108, 185701 (2012).
A. Tsurumaki, H. Yamada, and A. Sawa,“Impact of Bi Deficiencies on Ferroelectric Resistive Switching Characteristics Observed at p-Type Schottky-Like Pt/Bi1-δFeO3 Interfaces”, Advanced Functional Materials 22, 1040 (2012).
J. J. Yang, I. H. Inoue, T. Mikolajick, C. S. Hwang, “Metal oxide memories based on thermochemical and valence change mechanisms”, MRS BULLETIN 37, 131 (2012).
C. Rumble, M. Itou, N. Hiraoka, Y. Sakurai, Y. Tomioka, Y. Tokura, J. E. Penner-Hahn, and A. Deb, “Imaging of 3d Mn orbitals in the ferromagnetic state for Ca-substituted manganite: Magnetic Compton investigation”, Physical Review B 85, 045128 (2012).
[2011]
P.-H. Xiang, S. Asanuma, H. Yamada, I. H. Inoue, H. Sato, H. Akoh, A. Sawa, K. Ueno, H. Yuan, H. Shimotani, M. Kawasaki, and Y. Iwasa, “Strain-Mediated Phase Control and Electrolyte-Gating of Electron-Doped Manganites”, Advanced Materials 23, 5822 (2011).
S. Ishida, T. Liang M. Nakajima, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Kakeshita, T. Kida, M. Hagiwara, Y. Tomioka, T. Ito, and S. Uchida, "Manifestations of multiple-carrier charge transport in the magnetostructurally ordered phase of BaFe2As2", Physical Review B 84, 184514 (2011).
K. Oka, T. Ito, H. Eisaki, M. Hase, T. Hamasaki, H. Kuroe, and T. Sekine, "Crystal growth of Cu3ZnxMo2O9 by continuous solid-state crystallization method", Journal of Crystal Growth 334, 108 (2011).
T. Terashima, N. Kurita, M. Tomita, K. Kihou, C.-H. Lee, Y. Tomioka, T. Ito, A. Iyo, H. Eisaki, T. Liang, M. Nakajima, S. Ishida, S. Uchida, H. Harima, and S. Uji, "Complete Fermi Surface in BaFe2As2 Observed via Shubnikov de Haas Oscillation Measurements on Detwinned Single Crystals", Physical Review Letters 107, 176402 (2011).
T. Ito, T. Ushiyama, Y. Yanagisawa, R. Kumai, and Y. Tomioka, "Growth of Highly Insulating Bulk Single Crystals of Multiferroic BiFeO3 and Their Inherent Internal Strains in the Domain-Switching Process", Crystal Growth & Design 11, 5139 (2011).
B.-S. Li, A. Sawa, and Hiroshi Okamoto, “Suppression of Precipitates in the La2-xSrxCuO4 Films Grown on LaSrAlO4 Substrates by Introducing Homoepitaxial Layer”, Japanese Journal of Applied Physics 50, 093101 (2011).
T. Asano, T. Nishimura, S. Ichimura, Y. Inagaki, T. Kawae, T. Fukui, Y. Narumi, K. Kindo, T. Ito, S. Haravifard, and B. D. Gaulin, "Magnetic Ordering and Tunable Structural Phase Transition in the Chromic Compound CuMoO4", Journal of the Physical Society of Japan 80, 093708 (2011).
H. Yada, M. Matsubara, H. Matsuzaki, H. Yamada, A. Sawa, and H. Okamoto,“Discrimination between photodoping- and heat-induced magnetization changes in Nd0.52Sr0.48MnO3 using a heterostructure with SrTiO3”, Physical Review B 84, 045114 (2011).
H. Kuroe, T. Hosaka, S. Hachiuma, T. Sekine, M. Hase1, K. Oka, T. Ito, H. Eisaki, M. Fujisawa, S. Okubo, and H. Ohta, "Electric Polarization Induced by Neel Order without Magnetic Superlattice: Experimental Study of Cu3Mo2O9 and Numerical Study of a Small Spin Cluster", Journal of the Physical Society of Japan 80, 083705 (2011).
M. Nakajima, T. Liang, S. Ishida, Y. Tomioka, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Kakeshita, T. Ito, and S. Uchida, "Unprecedented anisotropic metallic state in undoped iron arsenide BaFe2As2 revealed by optical spectroscopy", Proceedings of the National Academy of Sciences 108, 12238 (2011).
H. Kuroe, T. Hamasaki, T. Sekine, M. Hase, K. Oka, T. Ito, H. Eisaki, K. Kaneko, N. Metoki, M. Matsuda, K. Kakurai, “Hybridization of magnetic excitations between quasi-one-dimensional spin chains and spin dimers in Cu3Mo2O9 observed using inelastic neutron scattering”, Physical Review B 83, 184423 (2011).
J. Nozawa, K. Tsukamoto, W. van Enckevort, T. Nakamura, Y. Kimura, H. Miura, H. Satoh, K. Nagashima, and M. Konoto, “Magnetite 3D Colloidal Crystals Formed in the Early Solar System 4.6 Billion Years Ago”, Journal of the American Chemical Society 133, 8782 (2011).
S. Y. Zhou, Y. Zhu, M. C. Langner, Y.-D. Chuang, P. Yu, W. L. Yang, A. G. Cruz Gonzalez, N. Tahir, M. Rini, Y.-H. Chu, D.-H. Lee, Y. Tomioka, Y. Tokura, Z. Hussain and R. W. Schoenlein, “Ferromagnetic Enhancement of CE-Type Spin Ordering in (Pr,Ca)MnO3”, Physical Review Lettetters 106, 186404-1-5 (2011).
H. Yada, M. Matsubara, H. Yamada, A. Sawa, H. Matsuzaki, and H. Okamoto, “Ultrafast control of magnetization by photocarrier injection in La0.9Sr0.1MnO3/SrTiO3
heterostructures”, Physical Review B 83, 165408 (2011).
H. Okamoto, T. Miyagoe, K. Kobayashi, H. Uemura, H. Nishioka, H. Matsuzaki, A. Sawa, and Y. Tokura, “Photoinduced transition from Mott insulator to metal in the undoped cuprates Nd2CuO4 and La2CuO4”, Physical Review B 83, 125102 (2011).
A. Dussaux, A. V. Khvalkovskiy, J. Grollier, V. Cros, A. Fukushima, M. Konoto, H. Kubota, K. Yakushiji, S. Yuasa, K. Ando, and A. Fert, “Phase locking of vortex based spin transfer oscillators to a microwave current”, Applied Physics Letters 98, 132506 (2011).
[2010]
M. Nakamura, A. Sawa, J. Fujioka, M. Kawasaki, and Y. Tokura, “Interface band profiles of Mott-insulator/Nb:SrTiO3 heterojunctions as investigated by optical spectroscopy”, Physical Review B 82, 201101(R) (2010).
S. Asanuma, P.-H. Xiang, H. Yamada, H. Sato, I. H. Inoue, H. Akoh, A. Sawa, K. Ueno, H. Shimotani, H. Yuan, M. Kawasaki, and Y. Iwasa, “Tuning of the metal-insulator transition in electrolyte-gated NdNiO3 thin films”, Applied Physics Letters 97, 142110 (2010).
H. Okamoto, T. Miyagoe, K. Kobayashi, H. Uemura, H. Nishioka, H. Matsuzaki, A. Sawa, and Y. Tokura, “Ultrafast charge dynamics in photoexcited Nd2CuO4 and La2CuO4 cuprate compounds investigated by femtosecond absorption spectroscopy”, Physical Review B 82, 060513(R) (2010).
P.-H. Xiang, S. Asanuma, H. Yamada, I. H. Inoue, H. Akoh and A. Sawa, “Room temperature Mott metal-insulator transition and its systematic control in Sm1-xCaxNiO3 thin film”, Applied Physics Letters 97, 032114 (2010).
X. P. Huang, Z. L. Shi, M. Wang, M. Konoto, H.-S. Zhou, G.-B. Ma, D. Wu, R. Peng, and N. B. Ming, “Formation of Regular Magnetic Domains on Spontaneously Nanostructured Cobalt Filaments”, Advanced Materials 22, 2711 (2010).
M. Konoto, A. Fukushima, R. Matsumoto, H. Kubota, K. Yakushiji, A. Sawa, S. Yuasa, K. Ando, “Direct imaging of local spin orientation within artificial nanomagnets”, Applied Physics Express 3, 063001 (2010).
A. Dussaux, B. Georges, J. Grollier, V. Cros, A. V. Khvalkovskiy, A. Fukushima, M. Konoto, H. Kubota, K. Yakushiji, S. Yuasa, K. A. Zvezdin, K. Ando, and A. Fert, “Large microwave power emission from current-induced vortex dynamics in magnetic tunnel junctions”, Nature Communications 1:8 doi: 10.1038/ ncomms1006 (2010).
P.-H. Xiang, H. Yamada, A. Sawa, and H. Akoh, “Colossal magnetoresistance accompanied with magnetorelaxor behavior in phase-separated Ca1-xCexMnO3 thin films and CaMnO3/Ca0.92Ce0.08MnO3 superlattices”, Journal of Applied Physics 107, 063717 (2010).
H. Yamada, P.-H. Xiang, and A. Sawa, “Phase evolution and critical behavior in strain-tuned LaMnO3-SrMnO3 superlattices”, Physical Review B 81, 014410 (2010).
T. Kohashi, M. Konoto, and K. Koike, “High-resolution spin-polarized scanning electron microscopy (spin SEM)
”, Journal of Electron Microscopy, 59, 43 (2010).
[2009]
S. Asanuma, H. Akoh, H. Yamada, and A. Sawa, “Relationship between resistive switching characteristics and band diagrams of Ti/Pr1-xCaxMnO3 junctions”, Physical Review B 80, 235113 (2009).
D. Okuyama, M. Nakamura, Y. Wakabayashi, H. Itoh, R. Kumai, H. Yamada, Y. Taguchi, T. Arima, M. Kawasaki, and Y. Tokura, “Epitaxial-strain effect on charge/orbital order in Pr0.5Ca0.5MnO3 films”, Applied Physics Letters 95, 152502 (2009).
M. Konoto, H. Akoh, and Y. Tokura, “A compact surface decontamination system for surface-sensitive magnetic imaging”, Review of Scientific Instruments, 80, 086101 (2009).
P. -H. Xiang, H. Yamada, A. Sawa, and H. Akoh, “Strain-controlled electronic properties and magnetorelaxor behaviors in electron-doped CaMnO3 thin films”, Applied Physics Letters, 94, 062109 (2009).
[2008]
M. Konoto, H. Yamada, K. Koike, H. Akoh, M. Kawasaki, and Y. Tokura, “Magnetic quasidomain structures in Ru-doped La0.6Sr0.4MnO3 thin films”, Applied Physics Letters, 93, 252503 (2008).
N. Hosaka, H. Yamada, Y. Shimada, J. Fujioka, S. Bordacs, I. Kezsmarki, M. Kawasaki, and Y. Tokura, “Magneto-optical characterization on the ferromagnetic-paramagnetic transitions in the composition-spread epitaxial film of Sr1-xCaxRuO3”, Applied Physics Express, 1, 113001 (2008).
T. Nagai, H. Yamada, M. Konoto, T. Arima, M. Kawasaki, K. Kimoto, Y. Matsui, and Y. Tokura, “Direct observation of the spin structures of vortex domain walls in ferromagnetic nanowires”, Physical Review B, 78, 180414 (2008).
A. Sawa, “Resistive switching in transition-metal oxides”, Materials Today,11, 6, 28 (2008).
J. Matsuno, A. Sawa, M. Kawasaki, and Y. Tokura, “Magnetic-field tuning of interface electronic properties in manganite-titanate junctions”, Applied Physics Letters, 92, 122104 (2008).
H. Yamada, N. Kida, H. Sato, H. Akoh, T. Arima, M. Kawasaki, and Y. Tokura, “Optical magnetoelectric effect at CaRuO3-CaMnO3 interfaces as a polar ferromagnet”, Applied Physics Letters, 92, 062508 (2008).
M. Konoto, T. Yamada, K. Koike, H. Akoh, T. Arima, and Y. Tokura, “Formation and control of magnetic vortex chirality in patterned micromagnet arrays”, Journal of Applied Physics 103，023904 (2008).