Photoinduced Processing Technology


Pursuing ultra-short pulsed light and plasma generation technologies, and seeking its application
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Creation of innovative electronics and photonics technology: from exploring functional materials to developing energy-saving devices

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September 6,2021
Shigeyuki Ishida, Senior Researcher, Hiraku Ogino, Senior Researcher, Akira Iyo, Chief Senior Researcher and Hiroshi Eisaki, Prime Senior Researcher of Superconducting Electronics Group have published the research result titled "Superconductivity-driven ferromagnetism and spin manipulation using vortices in the magnetic superconductor EuRbFe4As4" in "Proceedings of the National Academy of Sciences of the United States of America".
April 1,2021
Akihito Sawa is new director of Research Institute for Advanced Electronics and Photonics. Former director, Reiko Azumi took the post of deputy director of GaN Advanced Dvice Open Innovation Laboratory.
March 17,2021
Shota Nunomura, Chief Senior Researcher of Innovative Plasma Processing Group, was awarded "Best Paper Award” by Silicon Technology Division of the Japan Society of Applied Physics. His award-winning paper is titled "Real-time monitoring of surface passivation of crystalline silicon during growth of amorphous and epitaxial silicon layer", Journal of Applied Physics, vol. 128, p. 033302 (2020).
March 10,2021
Jaeho Kim, Senior Researcher, and Hajime Sakakita, Group Leader, received "Plasma Electronics Award" from Division of Plasma Electronics of the Japan Society of Applied Physics for a paper titled “Low-temperature graphene growth by forced convection of plasma-excited radicals”, Nano. Lett. 19 (2019) 739-746.
January 29,2021
Shota Nunomura, Chief Senior Researcher of Innovative Plasma Processing Group, was awarded "Plasma Material Science Award” by the Center for Low-temperature Plasma Sciences at Nagoya University, MEXT. His award-winning paper is titled " Development of real-time and in-situ detection technique for plasma-induced electronic defects".

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Superconductivity-driven ferromagnetism and spin manipulation using vortices in the magnetic superconductor EuRbFe4As4
The interaction between superconductivity and magnetism creates numerous exotic physical phenomena, while the two phenomena rarely coexist in one material due to their antagonistic nature. The recently discovered iron-based magnetic superconductor EuRbFe4As4 shows high-critical-temperature superconductivity and helimagnetic order at the ground state.
Shigeyuki Ishida, Senior Researcher, Hiraku Ogino, Senior Researcher, Akira Iyo, Chief Senior Researcher and Hiroshi Eisaki, Prime Senior Researcher of Superconducting Electronics Group, together with Comprehensive Research Organization for Science and Society (CROSS), TU Wien, and IMRA JAPAN CO., LTD, discovered a phenomenon that the spin orientation is determined by the direction of the superconducting vortices in EuRbFe4As4. Moreover, it was demonstrated that the domain structure of the local spins can be manipulated by the distribution of superconducting vortices. The capability of manipulating the spin texture by controlling the direction of superconducting vortices opens a path to novel devices such as superconducting memories using magnetic superconductors.
For the details, please refer to "Proceedings of the National Academy of Sciences of the United States of America".

A. Crystal structure of EuRbFe4As4. Blue arrows indicate the direction of the Eu2+ moments in the magnetically ordered state.
B. Temperature dependence of magnetization. Superconducting transition and magnetic ordering ocurr at 36 K and 15 K, respectively.


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