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“
Uchimura kun, Kanno kun, and Chiba kun joined us as master course students.
Online kick-off meeting was held on April 2.
Igarashi kun (Doctor), Borders kun (Doctor), Okuda kun (Master), Takamatsu kun (Master), Zoysa kun (Master), K. Kishi kun (Bachelor), and Kobayashi kun (Bachelor) received their degree. Congratulations!
Junta Igarashi (D3) is awarded the President’s Award. Congratulations!
K. Kobayashi (B4) is awarded the Outstanding Student Award of the Institute of Electronics, Information and Communication Engineers Tohoku. Congratulations!
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.
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!
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“.
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!
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.
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 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.
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.
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.
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.
Our paper “Composition dependence of spin−orbit torque in Pt1−xMnx/CoFeB heterostructures” by K. V. De Zoysa, S. DuttaGupta, R. Itoh, Y. Takeuchi, H. Ohno, and S. Fukami was published in Applied Physics Letters. This paper is selected to Editor’s Pick.
Our invited paper “Neuromorphic computing with antiferromagnetic spintronics” by A. Kurenkov, S. Fukami, H. Ohno. was published in Journal of Applied Physics.
Our paper “Current distribution in metallic multilayers from resistance measurements” by O. Stejskal, A. Thiaville, J. Hamrle, S. Fukami, and H. Ohno was published in Physical Review B.
Our review paper “Scaling magnetic tunnel junction down to single-digit nanometers — Challenges and prospects” by B. Jinnai, K. Watanabe, S. Fukami, H. Ohno was published in Applied Physics Letters. This paper is selected to a Featured Article.
Our paper “Visualizing Magnetic Structure in 3D Nanoscale Ni–Fe Gyroid Networks” by J. Llandro, S. Fukami, H. Ohno et al. was published in Nano Letters.
Press release is here.
N. Abe-kun(M1) has joined us!
Welcome to our laboratory!
Degree award ceremony was held. Takeuchi kun (D), Dohi kun (D), Koga kun (M), Funatsu kun (M), Furuya kun (M), Miyasaka kun (M), Takechi kun (B), and Hayakawa kun (B), congratulations! We hope for your success in new place.
T. Dohi (D3) has received the Graduate School of Engineering Award. Congratulations!
A review paper “Neuromorphic spintronics” by J. Grollier, D. Querlioz, K. Y. Camsari, K. Everschor-Sitte, S. Fukami & M. D. Stiles was published in Nature Electronics.
DDr. Samik DuttaGupta, an Assistant Professor of CSIS, is awarded the Best Poter Award in held in Sendai International Center. Congratulations!
Dr. Yuta Yamane, an Assistant Professor of the Frontier Research Institute for Interdisciplinary Sciences, joined us.
Dr. Aleksandr Kurenkov was awarded the Grand Prize of 2018-19 Photo Contest of Tohoku University. Congratulations!
Link to University website
Our paper “Stack structure and temperature dependence of spin-orbit torques in heterostructures with antiferromagnetic PtMn” by R. Itoh, Y. Takeuchi, S. DuttaGupta, S. Fukami, and H. Ohno was published in Applied Physics Letters.
We will report a result of SOT-MRAM at IEDM2019 held in San Francisco, USA. This research has been conducted under a collaboration with the Center for Innovative Integrated Electronic Systems, Tohoku University.
Press release is here.
We hold the 17th RIEC International Workshop on Spintronics and the 10th JSPS Core-to-Core Workshop, consisting of 28 invited talks/lectures and 35 poster presentations. We had 125 participants from 14 countries.
The 18th RIEC International Workshop on Spintronics is tentatively scheduled in November, 2020. We look forward to seeing you then!
Commentary article entitled “スピン軌道トルク素子の脳型情報処理応用” written by Assoc. Prof. S. Fukami was published in “まぐね”.
Our paper “Formation and current-induced motion of synthetic antiferromagnetic skyrmion bubbles” by T. Dohi, S. DuttaGupta, S. Fukami, and H. Ohno was published in Nature Communications and was selected to the Editor’s Highlight.
Press release for this paper is here.
Our co-authored paper “Giant perpendicular magnetic anisotropy in Ir/Co/Pt multilayers” by Y.-C. Lau, Z. Chi, T. Taniguchi, M. Kawaguchi, G. Shibata, N. Kawamura, M. Suzuki, S. Fukami, A. Fujimori, H. Ohno, and M. Hayashi has been published in Physical Review Materials.
Our paper “Write-error rate of nanoscale magnetic tunnel junctions in the precessional regime,” by T. Saino, S. Kanai, M. Shinozaki, B. Jinnai, H. Sato, S. Fukami, and H. Ohno was published in Applied Physics Letters.
W. A. Borders (D2) received the Outstanding Paper Award and T. Dohi (D3) received the Young Scientist Presentation Award in a ceremony held in the 80th JSAP Autumn Meeting 2019 in Hokkaido University
Our paper “Integer factorization using stochastic magnetic tunnel junctions” by W. A. Borders, A. Z. Pervaiz, S. Fukami, K. Y. Camsari, H. Ohno ＆ S. Datta was published in Nature.
Press release for this paper is here.
Our paper “Spin-Pumping-Free Determination of Spin-Orbit Torque Efficiency from Spin-Torque Ferromagnetic Resonance” by A. Okada, Y. Takeuchi., K. Furuya, C. Zhang, H. Sato, S. Fukami, and H. Ohno was published in Physical Review Applied.
We held welcome party for Valentin.
W. A. Borders (D2), S. Fukami (Assoc. Prof.), and H. Ohno (Adviser) received the Japanese Society of Applied Physics, Outstanding Paper Award for their paper “Analogue spin–orbit torque device for artificial-neural-network-based associative memory operation” published in Applied Physics Express in 2017.
Mr. Valentin Desbuis, an internship student from School of Mines Nancy, joined us.