“Graduation research presentations” held
We hold a meeting of the graduation research presentations given by 6 students from Ikeda lab, Otsuka lab, and Fukami lab.
Paper by Prof. Takeuchi et al. published in Applied Physics Letters
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 released
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.
Paper published in Physical Review Applied
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.
Prof. Ohno is awarded the IEEE Magnetics Society’s 2022 Achievement Award
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.”
Paper published in Physical Review Materials
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.
Prof. Ohno has been added to the Royal Swedish Academy of Engineering Sciences
Professor Ohno, the current president of Tohoku University, has been added to the International Fellows of the Royal Swedish Academy of Engineering Sciences.
Presentation will be given in the 67th Annual IEEE International Electron Devices Meeting (IEDM2021)
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”
Paper by Prof. Takeuchi et al. published in Applied Physics Letters
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.
Paper published in Nature Materials
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.
“1st Online RIEC International Workshop on Spintronics” held
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.
Mr. Kobayashi is awarded the Best Poster Award, Mr. Kishi is awarded the Poster Award
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!
Prof. Yamane is awarded the Young Scientist Award
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”.
“1st Online RIEC International Workshop on Spintronics” will be held
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.
Paper published by Mr. Kobayashi et al. published in Applied Physics Letters
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 was posted on YouTube
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.
Paper published in Scientific Reports
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.
Paper published in Journal of the Physical Society of Japan
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.
Paper by Dr. Dohi et al. published in Physical Review B
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.
Paper by Dr. J.-Y. Yoon et al. published in AIP Advances
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.
Paper published in Nature Communications
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“
Paper by Prof. Takeuchi et al. published in Nature Materials
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“
Paper by Prof. Fukami et al. published in the Early Access area of the IEEE Transactions on Magnetics
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.
Paper published in Physical Review Applied
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 published in Nature Reviews Materials
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“
“On line alumni reunion” held
We held an online alumni reunion. English version will be held soon.
“Online kick-off meeting” held
Mr. Uchimura, Mr. Kanno, and Mr. Chiba joined us as master course students.
Online kick-off meeting was held on April 2.
Received their degre
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. Igarashi is awarded thePresident’s Award
Mr. Junta Igarashi (D3) is awarded the President’s Award. Congratulations!
Mr. Kobayashi is awarded the Outstanding Student Award of the Institute of Electronics, Information and Communication Engineers Tohoku
Mr. K. Kobayashi (B4) is awarded the Outstanding Student Award of the Institute of Electronics, Information and Communication Engineers Tohoku. Congratulations!
Mr. Igarashi is awarded the Best Poster Award
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!
Paper by Mr. Hayakawa et al. and paper by Prof. Kanai et al. published in Physical Review Letters and Physical Review B, respectively
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“
Paper published in Journal of Magnetism and Magnetic Materials
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.
Paper published in Physical Review B as a Letter
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.
Paper published in Applied Physics Letters
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.
Paper by Prof. Jinnai et al. published in Applied Physics Letters
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.)
Paper by Mr. Igarashi et al. published in Applied Physics Letters
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.
Paper published in an Early Access area of IEEE Journal of Solid-State Circuits
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.
Presentation will be given in the IEEE International Electron Devices Meeting (IEDM2020)
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”
Paper by Mr. Igarashi et al. published in Nano Letters
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.
Paper by Mr. Shinozaki et al. published in Applied Physics 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.
Mr. Igarashi is awarded the Young Scientist Presentation Award
J. Igarashi (D3) was awarded the Young Scientist Presentation Award in the JSAP Autumn Meeting. The title of the presentation was “Energy barrier of X/1X-nm shape-anisotropy magnetic tunnel junctions at high temperature”. Congratulations!
Paper by prof. DuttaGupta et al. published in Nature Communications
Our paper “Spin-orbit torque switching of an antiferromagnetic metallic heterostructure” by Samik DuttaGupta, A. Kurenkov, Oleg A. Tretiakov, G. Krishnaswamy, G. Sala, V. Krizakova, F. Maccherozzi, S. S. Dhesi, P. Gambardella, S. Fukami & H. Ohno was published in Nature Communications.
Press release: “Antiferromagnetic Material’s Giant Stride Towards Application“.
Mr. Igarashi is awarded the Best English Presentation Award
J. Igarashi (D3) was awarded the Best English Presentation Award in the JSAP Autumn Meeting. The title of the presentation was “Energy barrier of X/1X-nm shape-anisotropy magnetic tunnel junctions at high temperature”. Congratulations!
Paper published in Physical Review Applied
Our paper “Multidomain Memristive Switching of Pt38Mn62/[Co/Ni]n Multilayers” by G. K. Krishnaswamy, A. Kurenkov, G. Sala, M. Baumgartner, V. Krizakova, C. Nistor, F. Maccherozzi, S. S. Dhesi, S. Fukami, H. Ohno, and P. Gambardella was published in Physical Review Applied.
Paper published in Advanced Science
Our paper “Energy Efficient Control of Ultrafast Spin Current to Induce Single Femtosecond Pulse Switching of a Ferromagnet” by Q. Remy, J. Igarashi, S. Iihama, G. Malinowski, M. Hehn, J. Gorchon, J. Hohlfeld, S. Fukami, H. Ohno, and S. Mangin was published in Advanced Science.
Press release is here.
Prof. Ohno (Advisor) gave an online seminar
Prof. Ohno (Advisor) gave an online seminar entitled “Spintronics Nanodevice – How small can we make it and what else can we use it for -” at the On-line SPICE-SPIN+X Seminars. The video is available on YouTube.
Paper published in Applied Physics Letters
Our paper “All-optical probe of magnetization precession modulated by spin–orbit torque” by K. Ishibashi, S. Iihama, Y. Takeuchi, K. Furuya, S. Kanai, S. Fukami, and S. Mizukami was published in Applied Physics Letters. This paper is selected to a Featured Article.
Paper by Prof. Fukami et al. published in Journal of Applied Physics
Our paper “Antiferromagnetic spintronics” by S. Fukami, V. O. Lorenz, and O. Gomonay was published in Journal of Applied Physics.
This paper is a Guest Editorial for the Special Topic “Antiferromagnetic Spintronics” in the Journal of Applied Physics, to which Prof. Fukami had served as a Guest Editor.
Paper published in Nature Communications
Our paper “Giant voltage-controlled modulation of spin Hall nano-oscillator damping” by H. Fulara, M. Zahedinejad, R. Khymyn, M. Dvornik, S. Fukami, S. Kanai, H. Ohno and J. Åkerman was published in Nature Communications.
Press release is here.