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Associate Professor
Department of I&E Visionaries
Faculty of Information Science and Electrical Engineering
Kyushu University
I am dedicated to developing innovative electronic devices that advance the electronics industry by integrating semiconductor engineering and spintronics. My research interests encompass a broad spectrum, from the epitaxial growth of magnetic and semiconducting materials to the device physics driven by nanotechnology.
Profile
Dr. Naoto Yamashita is originally from Ono Town, Gifu, Japan. After obtaining a master's degree in the Department of Electronic Science and Engineering at Kyoto University, he worked at a Japanese automotive parts manufacturer, where he was responsible for technology development and mass production design for next-generation electric vehicles. In April 2020, he began working as a Japan Society for the Promotion of Science (JSPS) Research Fellow (DC1), conducting foundational research towards the practical application of silicon-based spin devices at Kyoto University. In July 2021, he completed this doctorate in a shorter timespan than the standard program length, completing it 1 year and 2 months ahead of the regular term. In August 2021, he joined Kyushu University as an assistant professor. In January 2025, he started current position.
Currently, his research focuses on the application of spin-orbital torque for ferrimagnetic garnets, spin current transport, and their thermal effects in semiconductors. He promotes multiple international collaborative research projects and engages in seminar presentations, with a strong emphasis on international research activities.
In 2016, he received the English Presentation Award from the Professional Group of Spintronics in the Japan Society of Applied Physics. In 2024, he completed the Diversity Super Global Faculty Development Program (SENTAN-Q) at Kyushu University.
He likes to play and watch soccer, and ride his bicycle (both are everyday examples of spin-orbit coupling and the conservation law of angular momentum!).
Main Research Papers
⭐Roselle Ngaloy$, Naoto Yamashita*$, Bing Zhao, Soojung Kim, Kohei Yamashita, Ivo P. C. Cools, Marlis N. Agusutrisno, Soobeom Lee, Yuichiro Kurokawa, Chun-Yeol You, Hiromi Yuasa, Saroj P. Dash$, "Deterministic spin-orbit torque switching of epitaxial ferrimagnetic insulator with perpendicular magnetic anisotropy fabricated by on-axis magnetron sputtering", npj Spintronics 3, 40 (2025).
Marlis N Agusutrisno*, Sora Obinata, Takamasa Okumura, Kunihiro Kamataki, Naho Itagaki, Kazunori Koga, Masaharu Shiratani, Naoto Yamashita, ”Large-scale fabrication of thulium iron garnet film with perpendicular magnetic anisotropy using RF magnetron sputtering”, Japanese Journal of Applied Physics 63, 07SP06 (2024).
⭐Marlis N Agusutrisno*, Takamasa Okumura, Kunihiro Kamataki, Naho Itagaki, Kazunori Koga, Masaharu Shiratani, Naoto Yamashita, ”Effect of nanoscale inhomogeneity on blocking temperature of ZnO:Co films fabricated by using nitrogen-mediated crystallization”, MRS Advances (2024).
⭐Marlis Nurut Agusutrisno, Christopher H. Marrows, Kunihiro Kamataki, Takamasa Okumura, Naho Itagaki, Kazunori Koga, Masaharu Shiratani, Naoto Yamashita*, ”On-axis sputtering fabrication of Tm3Fe5O12 film with perpendicular magnetic anisotropy”, Thin Solid Films 788, 140176 (2024). Open access.
M. N. Agusutrisno*, Ryota Narishige, Kunihiro Kamataki, Takamasa Okumura, Naho Itagaki, Kazunori Koga, Masaharu Shiratani, Naoto Yamashita, ”Control of inhomogeneity and magnetic properties of ZnO:Co films grown by magnetron sputtering using nitrogen”, Materials Science in Semiconductor Processing 162, 107503 (2023).
⭐N. Yamashita*, R. Mitsuishi, Y. Nakamura, K. Takeda, M. Hori, K. Kamataki, T. Okumura, K. Koga, and M. Shiratani, ”Role of insoluble atoms in the formation of a three-dimensional buffer layer in inverted Stranski-Krastanov mode”, Journal of Materials Research (2023), Invited paper.
Ryota Narishige*, Naoto Yamashita, Kunihiro Kamataki, Takamasa Okumura, Kazunori Koga, Masaharu Shiratani, Hisato Yabuta, Naho Itagaki, ”Effects of substrate surface polarity on heteroepitaxial growth of pseudobinary ZnO–InN alloy films on ZnO substrates”, Journal of Materials Research (2022), Invited paper.
⭐N. Yamashita, E. Shigematsu, S. Honda, R. Ohshima, M. Shiraishi, and Y. Ando*, "Realization of efficient tuning of the Fermi level in iron-based ferrimagnetic alloys", Physical Review Materials 6, 104405 (2022). Highlight in Physics
Yuta Nakamura$, Naoto Yamashita*$, Kunihiro Kamataki, Takamasa Okumura, Kazunori Koga, Masaharu Shiratani and Naho Itagaki* ($: these authors contributed equally to this study), “Growth of single crystalline ZnO films on 18%-lattice-mismatched sapphire substrates using buffer layers with three-dimensional islands”, Crystal Growth & Design 22, 6, 3770-3777 (2022).
D. Takahashi*, N. Yamashita, D. Yamashita, K. Okumura, K. Kamataki, K. Koga, M. Shiratani and N. Itagaki, “Epitaxial growth of Zn1-xMgxO films on sapphire substrates via inverted Stranski-Krastanov mode using magnetron sputtering”, MRS Advances (2022).
S. Lee, H. Koike, M. Goto, S. Miwa, Y. Suzuki, N. Yamashita, R. Ohshima, E. Shigematsu, Y. Ando and M. Shiraishi*, "Synthetic Rashba spin-orbit system using a silicon metal-oxide semiconductor", Nature Materials 20, 1228 (2021).
N. Yamashita*, S. Lee, R. Ohshima, E. Shigematsu, H. Koike, Y. Suzuki, S. Miwa, M. Goto, Y. Ando and M. Shiraishi, "Investigation of the thermal tolerance of silicon-based lateral spin valves", Scientific Reports 11, 10583 (2021).
N. Yamashita*, S. Lee, R. Ohshima, E. Shigematsu, H. Koike, Y. Suzuki, S. Miwa, M. Goto, Y. Ando and M. Shiraishi, "Enhancement of spin signals by thermal annealing in silicon-based lateral spin valves", AIP Advances 10, 095021 (2020). Editor’s Pick.
⭐Naoto Yamashita, Yuichiro Ando, Hayato Koike,Shinji Miwa, Yoshishige Suzuki, and Masashi Shiraishi*, "Thermally Generated Spin Signals in a Nondegenerate Silicon Spin Valve", Physical Review Applied 9, 054002 (2018).
S. Lee, N. Yamashita, Y. Ando*, S. Miwa, Y. Suzuki, H. Koike and M. Shiraishi*, "Investigation of spin scattering mechanism in silicon channel of Fe/MgO/Si lateral spin valves", Applied Physics Letters 110, 192401 (2017).
Press Coverage
2025-10-14 Nikkei https://www.nikkei.com/article/DGXZRSP697963_U5A011C2000000
2024-09-15 Yano e-plus https://www.fujisan.co.jp/product/1281683074/new
2024-01-26 EE Times https://eetimes.itmedia.co.jp/ee/articles/2401/24/news056.html
2024-01-15 Tech + https://news.mynavi.jp/techplus/article/20240115-2863420
2022-10-12 Physics https://physics.aps.org/articles/v15/s136?fbclid=IwAR3-ZSmi6OQLyiDdDfJPDSvuuS-Li8fiGshVOnU9lWOfKBM3XmJK26_GNag
2018-05-04 日刊工業新聞 https://www.nikkan.co.jp/articles/view/00472097
Contact
Please send me an email (yamashita.naoto.952{at}m.kyushu-u.ac.jp) or type message from here.
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