Our paper “Observation of domain structure in non-collinear antiferromagnetic Mn3Sn thin films by magneto-optical Kerr effect” by T. Uchimura, J. Yoon, Y. Sato, Y. Takeuchi, S. Kanai, R. Takechi, K. Kishi, Y. Yamane, S. DuttaGupta, J. Ieda, H. Ohno, and S. Fukami has been published in Applied Physics Letters.
Our paper “Theory of Emergent Inductance with Spin-Orbit Coupling Effects” by Y. Yamane, S. Fukami, and J. Ieda was published in Physical Review Letters.
Our paper “Generalized scaling of spin qubit coherence in over 12,000 host materials” by Shun Kanai, F. Joseph Heremans, Hosung Seo, Gary Wolfowicz, Christopher P. Anderson, Sean E. Sullivan, Mykyta Onizhuk, Giulia Galli, David D. Awschalom, and Hideo Ohno was published in Proceedings of National Academy of Science of the United States of America.
Press release: “A Mathematical Shortcut for Determining Quantum Information Lifetimes“
Mr. Shinozaki (Doctor), Mr. Abe (Master), Mr. Takechi (Master), and Mr. Hayakawa (Master) received their degree. Congratulations! We hope for your success in new place.
Professor Fukami was selected to the Inamori Research Institute for Science (InaRIS) Fellowship Program. The accepted research topic is “Induction of “intelligence” in materials by artificial control and its development to computing”.
InaRIS Fellow Profile Video on YouTube is here.
Mr. Motoya Shinozaki (D3) is awarded the Graduate School of Engineering Award. Congratulations!
Our review paper “Domain wall memory: Physics, materials, and devices” by D. Kumar, T. Jin, R. Sbiaa, M. Kläui, S. Bedanta, S. Fukami, D. Ravelosona, S.-H. Yang, X. Liu, S.N. Piramanayagam was published in Physics Reports.
An interview to Prof. Fukami was published online in an article titled “Laying the groundwork for a more resilient planet” as a part of “Big 5 science nations” in Nature.
We hold a meeting of the graduation research presentations given by 6 students from Ikeda lab, Otsuka lab, and Fukami lab.
Our paper “Nanometer-thin L10-MnAl film with B2-CoAl underlayer for high-speed and high-density STT-MRAM: Structure and magnetic properties” by Y. Takeuchi, R. Okuda, J. Igarashi, B. Jinnai, T. Saino, S. Ikeda, S. Fukami, and H. Ohno was published in Applied Physics Letters.
This paper is selected to Editor’s Pick.
Outreach video of spintronics research sponsored by the IEEE Magnetics Society was released. Prof. Fukami and Prof. Hyunsoo Yang of the National University of Singapore appear in the video.
Our paper “Hardware-Aware In Situ Learning Based on Stochastic Magnetic Tunnel Junctions” by J. Kaiser, W. A. Borders, K. Y. Camsari, S. Fukami, H. Ohno, and S. Datta was published in Physical Review Applied.
This paper is selected to Editors’ Suggestion.
Professor Hideo Ohno received the IEEE Magnetics Society’s 2022 Achievement Award for “fundamental discoveries of spintronic phenomena and their applications in memory and computing technologies.”
Our paper “Modification of unconventional Hall effect with doping at the nonmagnetic site in a two-dimensional van der Waals ferromagnet” by R. R. Chowdhury, C. Patra, S. DuttaGupta, S. Satheesh, S. Dan, S. Fukami & R. P. Singh was published in Physical Review Materials.
Professor Ohno, the current president of Tohoku University, has been added to the International Fellows of the Royal Swedish Academy of Engineering Sciences.
We present “Fast Switching Down to 3.5 ns in Sub-5-nm Magnetic Tunnel Junctions Achieved by Engineering Relaxation Time” (by B. Jinnai, J. Igarashi, T. Shinoda, K. Watanabe, S. Fukami, and H. Ohno) in the 67th Annual IEEE International Electron Devices Meeting (IEDM2021) on December 11-15 in San Francisco.
Press release: “Magnetic Tunnel Junction Technology for the Angstrom Semiconductor Era”
Our paper “Temperature dependence of intrinsic critical current in perpendicular easy axis CoFeB/MgO magnetic tunnel junctions” by Y. Takeuchi, E. C. I. Enobio, B. Jinnai, H. Sato, S. Fukami, and H. Ohno was published in Applied Physics Letters.
This paper is selected to Featured Articles.
Our paper “Memristive control of mutual spin Hall nano-oscillator synchronization for neuromorphic computing” by M. Zahedinejad, H. Fulara, R. Khymyn, A. Houshang, M. Dvornik, S. Fukami, S. Kanai, H. Ohno and J. Åkerman was published in Nature Materials.
Press release is here.
The online session of the 1st Online RIEC International Workshop on Spintronics was held. We had more than 400 registrants from more than 30 countries/regions. We are grateful to all the panelists, invited speakers, and registrants who actively joined the discussion.
You can watch the recorded video of the live session and invited talks on the on-demand cite at least until the end of March, 2022. Anyone who registered can access the on-demand page.
K. Kobayashi (M1) is awarded the Best Poster Award in The 5th Symposium for The Core Research Clusters for Materials Science and Spintronics for his presentation entitled “Physical mechanism governing sigmoid curves of superparamagnetic tunnel junctions”, and K. Kishi (M1) is awarded the Poster Award for his presentation entitled “Effect of spin-orbit torque on non-collinear antiferromagnet Mn3Sn”.
Congratulations!
Y. Yamane (Assistant Professor) is awarded the Young Scientist Award of the Physical Society of Japan for his research entitled “Theoretical study on electric response of noncollinear antiferromagnets”.
It is our pleasure to announce the 1st Online RIEC International Workshop on Spintronics. The workshop consists of a live session to be held on November 18 and twelve on-demand invited talks. Once you register from the website of the workshop, you will receive a confirmation e-mail, which contains the information to access the on-demand contents and live session.
The panelists of the live session include the following researchers.
Pietro Gambardella (ETH Zürich)
Tomáš Jungwirth (Czech Academy of Sciences)
Mathias Kläui (Johannes Gutenberg-Universität Mainz)
Kyung-Jin Lee (KAIST)
Chi-Feng Pai (National Taiwan University)
Shunsuke Fukami (Tohoku University)
We hope for your active participation.
Our paper “Sigmoidal curves of stochastic magnetic tunnel junctions with perpendicular easy axis,” by K. Kobayashi, W. A. Borders, S. Kanai, K. Hayakawa, H. Ohno, and S. Fukami, was published in Applied Physics Letters.
Prof. Fukami’s talk entitled “Electrical Manipulation of Non-Collinear Antiferromagnet” given at the On-line SPICE-SPIN+X Seminar held on July 21 was posted on YouTube.
Prof. Fukami’s talk entitled “Nanosecond relaxation time in stochastic magnetic tunnel junction – theory and experiment” given at the online workshop held on June 19 organized by Petaspin/IEEE Magnetics Society – Italy chapter was posted on YouTube.
Our paper “Unconventional Hall effect and its variation with Co-doping in van der Waals Fe3GeTe2” by R. Roy Chowdhury, S. DuttaGupta, C. Patra, O. A. Tretiakov, S. Sharma, S. Fukami, H. Ohno & R. P. Singh was published in Scientific Reports.
Our paper “Spin-transport Mediated Single-shot All-optical Magnetization Switching of Metallic Films” by S. Iihama, Q. Remy, J. Igarashi, G. Malinowski, M. Hehn, and S. Mangin was published in Journal of the Physical Society of Japan.
Our paper “Influence of domain wall anisotropy on the current-induced hysteresis loop shift for quantification of the Dzyaloshinskii-Moriya interaction” by T. Dohi, S. Fukami, and H. Ohno was published in Physical Review B.
Our paper “Correlation of anomalous Hall effect with structural parameters and magnetic ordering in Mn3+xSn1−x thin films” by J.-Y. Yoon, Y. Takeuchi, S. DuttaGupta, Y. Yamane, S. Kanai, J. Ieda, H. Ohno, and S. Fukami was published in AIP Advances.
Our paper “Electrically connected spin-torque oscillators array for 2.4 GHz WiFi band transmission and energy harvesting” by R. Sharma, R. Mishra, T. Ngo, Y.-X. Guo, S. Fukami, H. Sato, H. Ohno and H. Yang was published in Nature Communications.
Press release: “Wireless and Battery-free Spintronic Energy Harvester“
Our paper “Chiral-spin rotation of non-collinear antiferromagnet by spin–orbit torque” by Y. Takeuchi, Y. Yamane, J.-Y. Yoon, R. Itoh, B. Jinnai, S. Kanai, J. Ieda, S. Fukami and H. Ohno was published in Nature Materials.
Press release: “A New Spintronic Phenomenon: Chiral-spin Rotation Found in Non-collinear Antiferromagnet“
A roadmap article “Roadmap of spin-orbit torques” by Q. Shao, P. Li, L. Liu, H. Yang, S. Fukami et al. was published in the Early Access area of the IEEE Transactions on Magnetics.
2021/06/25 Formal version of this paper was published. Link to the paper.
Our paper “Double-Free-Layer Magnetic Tunnel Junctions for Probabilistic Bits” by K. Y. Camsari, M. M. Torunbalci, W. A. Borders, H. Ohno, and S. Fukami was published in Physical Review Applied. This paper is selected to Editor’s Suggestion.
In addition, a synopsis “Maximizing Volatility in Magnetic Tunnel Junctions” is published in Physics Magazine of the American Physical Society.
A review paper “Quantum guidelines for solid-state spin defects” by G. Wolfowicz, F. J. Heremans, C. P. Anderson, S. Kanai, H. Seo, A. Gali, G. Galli, & D. D. Awschalom, was published in Nature Reviews Materials.
Press release: “A New Guideline for the Solid-state Spin Qubit“
We held an online alumni reunion. English version will be held soon.
Mr. Uchimura, Mr. Kanno, and Mr. Chiba joined us as master course students.
Online kick-off meeting was held on April 2.
Mr. Igarashi (Doctor), Mr, Borders (Doctor), Mr. Okuda (Master), Mr. Takamatsu (Master), Mr. Zoysa (Master), Mr, Kishi (Bachelor), and Mr. Kobayashi (Bachelor) received their degree. Congratulations!
Mr. Junta Igarashi (D3) is awarded the President’s Award. Congratulations!
Mr. K. Kobayashi (B4) is awarded the Outstanding Student Award of the Institute of Electronics, Information and Communication Engineers Tohoku. Congratulations!
Mr. J. Igarashi (D3) is awarded the Best Poster Award in The 4th International Symposium for The Core Research Cluster for Spintronics for his presentation entitled “Ultra-Small Shape-Anisotropy Magnetic Tunnel Junctions: Physics and Device Engineering”.
Congratulations!
Our papers “Nanosecond Random Telegraph Noise in In-Plane Magnetic Tunnel Junctions” by K. Hayakawa, S. Kanai, T. Funatsu, J. Igarashi, B. Jinnai, W. A. Borders, H. Ohno, and S. Fukami and “Theory of relaxation time of stochastic nanomagnets” by S. Kanai, K. Hayakawa, H. Ohno, and S. Fukami are jointly published in Physical Review Letters and Physical Review B, respectively.
These papers are selected to Editor’s Suggestion.
Press release: “Demonstrating the World’s Fastest Spintronics p-bit“
Our paper “Magnetization processes and magnetic domain structures in Ta/CoFeB/MgO stacks” by A. K. Dhiman, T. Dohi, W. Dobrogowski, Z. Kurant, I. Sveklo, S. Fukami, H. Ohno, A. Maziewski was published in Journal of Magnetism and Magnetic Materials.
Our paper “Intrinsic and extrinsic tunability of Rashba spin-orbit coupled emergent inductors” by J. Ieda and Y. Yamane was published in Physical Review B as a Letter.
This paper is selected to Editor’s Suggestion.
Our paper “Field-free and sub-ns magnetization switching of magnetic tunnel junctions by combining spin-transfer torque and spin–orbit torque” by C. Zhang, Y. Takeuchi, S. Fukami, and H. Ohno was published in Applied Physics Letters.
This paper is selected to Editor’s Pick.
Our paper “Coherent magnetization reversal of a cylindrical nanomagnet in shape-anisotropy magnetic tunnel junctions” by B. Jinnai, J. Igarashi, K. Watanabe, E. C. I. Enobio, S. Fukami, and H. Ohno was published in Applied Physics Letters.
This paper is selected to Editor’s Pick.
(2021/3/30; Erratum on this paper was published. In the original article, “sin” and “cos” were mistakenly swapped. The analysis was made by the correct form and the conclusions of the paper are not affected by this erratum.)
Our paper “Temperature dependence of the energy barrier in X/1X nm shape-anisotropy magnetic tunnel junctions” by J. Igarashi, B. Jinnai, V. Desbuis, S. Mangin, S. Fukami, and H. Ohno was published in Applied Physics Letters.
Our paper “Dual-Port SOT-MRAM Achieving 90-MHz Read and 60-MHz Write Operations Under Field-Assistance-Free Condition” by M. Natsui, A. Tamakoshi, H. Honjo, T. Watanabe, T. Nasuno, C. Zhang, T. Tanigawa, H. Inoue, M. Niwa, T. Yoshiduka, Y. Noguchi, M. Yasuhira, Y. Ma, H. Shen, S. Fukami, H. Sato, S. Ikeda, H. Ohno, T. Endoh, and T. Hanyu was published in an Early Access area of IEEE Journal of Solid-State Circuits.
We will present “High-Performance Shape-Anisotropy Magnetic Tunnel Junctions down to 2.3 nm” (by B. Jinnai, J. Igarashi, K. Watanabe, T. Funatsu, H. Sato, S. Fukami, and H. Ohno) in the IEEE International Electron Devices Meeting (IEDM2020) on December 12-18.
Press release: “The World’s Smallest High-performance Magnetic Tunnel Junction”
Our paper “Engineering Single-Shot All-Optical Switching of Ferromagnetic Materials” by J. Igarashi, Q. Remy, S. Iihama, G. Malinowski, M. Hehn, J. Gorchon, J. Hohlfeld, S. Fukami, H. Ohno, and S. Mangin was published in Nano Letters.
Our paper “Probing edge condition of nanoscale CoFeB/MgO magnetic tunnel junctions by spin-wave resonance” by M. Shinozaki, T. Dohi, J. Igarashi, J. Llandro, S. Fukami, and H. Ohno was published in Applied Physics Letters.