News

2024

Publication: Magnon-phonon coupling in synthetic antiferromagnets

Magnon-phonon coupling of synthetic antiferromagnets in a surface acoustic wave cavity resonator
H. Matsumoto, I. Yasuda, M. Asano, T. Kawada, M. Kawaguchi, D. Hatanaka, M. Hayashi
Nano Lett. 24, 5683 (2024).
4/25/2024

Hiroki's drawing made the cover in Nano Letters, congratulations!


Isamu Yasuda won the 20th Spintonics research division Best English presentation award!!

Place: The 84th Japan Applied Physics Society (JSAP) autumn meeting.
Title: Evaluation of magnetoelastic coupling by acoustic spin Hall effect in heavy-metal/ferromagnet/rare-earth tri-layer
Congratulations!
1/25/2024


2023

Publication: Optical detection of spin and orbital magnetic moments

Spin and orbital Hall currents detected via current-induced magneto-optical Kerr effect in V and Pt
Y. Marui, M. Kawaguchi, S. Sumi, H. Awano, K. Nakamura, M. Hayashi
Phys. Rev. B 108, 144436 (2023).
10/26/2023

Publication: Real time observation of current induced domain walls in ferrimagnets

Ultrafast stroboscopic time-resolved magneto-optical imaging of domain wall motion in Pt/GdFeCo wires induced by a current pulse
K. Ogawa, N. Yoshikawa, M. Ishibashi, K. Yakushiji, A. Tsukamoto, M. Hayashi, R. Shimano
Phys. Rev. Research 5, 033151 (2023).
9/1/2023

Publication: Determination of the magnetoelestic coupling constants

On-chip all-electrical determination of the magnetoelastic coupling constant of magnetic heterostructures
T Kawada, I Yasuda, M Kawaguchi, M Hayashi
Appl. Phys. Lett. 123, 092403 (2023).
8/23/2023

Publication: Magnon-phonon coupling in synthetic antiferromagnets

Cavity magnomechanical coupling with coupled magnon modes in a synthetic antiferromagnet
M. Asano, H. Matsumoto, M. Hayashi, D. Hatanaka
Phys. Rev. B 108, 064415 (2023).
8/10/2023

Publication: Spin Hall effect in ferromagnetic Dirac semimetals

Anisotropy of the spin Hall effect in a Dirac ferromagnet
G. Qu, M. Hayashi, M. Ogata, J. Fujimoto
Phys. Rev. B 108, 064404 (2023).
8/7/2023

Publication: Helicity dependent Raman scattering in PtSe2

Helicity-resolved Raman spectroscopy of mono- and a few-layers-thick PtSe2
I. Yasuda, T. Kawada, H. Matsumoto, M. Kawaguchi, M. Hayashi
Appl. Phys. Exp. 16, 053005 (2023).
5/30/2023

Takuya Kawada won the Unviersity of Tokyo, School of Science award!

Great work! Congratulations!!
3/23/2023

Publication: Helically distorted orthorhombic Tungsten predicted to exhibit large spin Hall effect

Large intrinsic spin Hall conductivity in orthorhombic tungsten
T. Ishikawa, R. Akashi, K. Kubo, Y. Toga, K. Inukai, I. Rittaporn, M. Hayashi, S. Tsuneyuki
Phys. Rev. Mater. 7, 026202 (2023).
[Press release]
2/15/2023

Haruo Kondo won the 18th Spintonics research division Best English presentation award!!

Place: The 83rd Japan Applied Physics Society (JSAP) autumn meeting.
Title: Pulsed Laser Induced Chirality Switching in Tellurium Thin Films
Congratulations!
1/25/2023

Publication: Current induced domain walls in ferrimagnetic TbFeCo alloy

Reversal of current-induced domain wall motion in TbFeCo ferrimagnetic thin films across the magnetization compensation point M. Ishibashi, K. Yakushiji, M. Kawaguchi, A. Tsukamoto, S. Nakatsuji, M. Hayashi
Jpn. J. Appl. Phys. 62 013001 (2023).
1/6/2023


2022

Takuya Kawada won the 53th JSAP young scientist presentation award!!

Place: The 83th Japan Applied Physics Society (JSAP) autumn meeting
Title: Spin-torque FMR induced by acoustic spin Hall effect
Congratulations!
11/17/2022

Hiroki Matsumoto and Mio Ishibashi won the TSQS International Symposium's Best Poster Presentation ward!!

Place: 2nd International Symposium on Trans-scale Quantum Science
Title (H. Matsumoto):Cavity magnetomechanics of surface acoustic waves with a synthetic antiferromagnet
Title (M. Ishibashi):Error rate of a ferrimagnetic spin shift resist
Congratulations!
11/11/2022

Hiroki Matsumoto won the JPS Student Presentation Award!!

Place: The Physical Society of Japan 2022 Autumn Meeting.
Title: Coupling between surface acoustic phonons and magnons in a synthetic antiferromagnet
Congratulations!
10/14/2022

Takuya Kawada won the XPS Best Student Award!!

The Program of Excellence in Photon Science (XPS) (XPS) Final Examination(FE)
Congratulations!
10/14/22

Hiroki Matsumoto won the JPS Student Presentation Award!!

Place: The Physical Society of Japan 2022 (77th) Annual Meeting.
Title: Surface acoustic phonons in a two-dimensional phononic graphene.
Congratulations!
5/20/2022

Publication: Spin magnetic moment current in Dirac materials

Spin Hall effect driven by the spin magnetic moment current in Dirac materials
Z. Chi, G. Qu, Y.-C. Lau, M. Kawaguchi, J. Fujimoto, K. Takanashi, M. Ogata, M. Hayashi
Phys. Rev. B 105, 214419 (2022).
6/14/2022

Publication: Highly non-reciprocal transmission of surface acoustic waves

Large surface acoustic wave nonreciprocity in synthetic antiferromagnets
H. Matsumoto, T. Kawada, M. Ishibashi, M. Kawaguchi, M. Hayashi
Appl. Phys. Express 15, 063003 (2022).
5/25/2022

Publication: Magnetic compensation in rare-earth baed ferrimagnetic alloy

Ferrimagnetic compensation and its thickness dependence in TbFeCo alloy thin films.
M. Ishibashi, K. Yakushiji, M. Kawaguchi, A. Tsukamoto, S. Nakatsuji, M. Hayashi
Appl. Phys. Lett. 120, 022405 (2022).
1/11/2022


2021

Takuya Kawada won the JPS Student Presentation Award!!

Place: The Physical Society of Japan 2021 autumn meeting.
Title: Materials dependence of the acoustic spin Hall effect.
Congratulations!
10/20/2021

Publication: Pt-Bi alloys for spin orbit torque three terminal devices

Charge–spin conversion in Pt_{1-x}Bi_{x} alloys for spin–orbit torque switching
Z. Chi, Y.-C. Lau, M. Kawaguchi, M. Hayashi
APL Mater. 9, 061111 (2021).
6/18/2021

Publication: Helicity dependent photocurrent in metal/semimetal bilayers

Interface-enhanced helicity dependent photocurrent in metal/semimetal bilayers
H. Hirose, M. Kawaguchi, Y.-C. Lau, Z. Chi, F. Freimuth, K. Takanashi, M. Hayashi
Phys. Rev. B 103, 174437 (2021).
5/28/2021

Publication: Polarized THz pulses from a spintronic THz emitter!

H. Niwa, N. Yoshikawa, M. Kawaguchi, M. Hayashi, R. Shimano
Optics Express 29, 13331 (2021).
[Editors' pick]
4/26/2021

Naruo Ohga won the Unviersity of Tokyo, Faculty of Science award!

Great work! Congratulations!!
3/18/2021

Publication: Machine learning and pattern recognition are used to determine the DMI from a single magnetic domain image!

Determination of the Dzyaloshinskii-Moriya interaction using pattern recognition and machine learning
M. Kawaguchi, K. Tanabe, K. Yamada, T. Sawa, S. Hasegawa, M Hayashi, Y. Nakatani
npj Computational Materials 7, 1 (2021).
[Press release]
1/29/2021


Publication: First principles studies on the relation between the anomalous Hall and spin Hall effects in ferromagnets

First Principles Investigation of Anomalous Hall and Spin Hall Effects in Ferromagnetic CoPt
G. Qu, K. Nakamura, M. Hayashi
J. Phys. Soc. Jpn. 90, 024707 (2021).
1/27/2021

Publication: Observation of the acoustic spin Hall effect in strong spin-orbit metals

Acoustic spin Hall effect in strong spin-orbit metals
T. Kawada, M. Kawaguchi, T. Funato, H. Kohno, M. Hayashi
Science Advances 7, eabd9697 (2021).
[Press release]
1/6/2021



2020

Publication: Bismuth thin films emit light in the terahertz frequency range!

Terahertz Emission from Thin Films Induced by Excitation with Circularly Polarized Light
Y. Hirai, N. Yoshikawa, H. Hirose, M. Kawaguchi, M. Hayashi, R. Shimano
Phys. Rev. Appl. 14, 064015 (2020).
[Editors' suggestion]

12/4/2020

Publication: Spin Hall effect of ferromagnets depends on their magnetization direction

Magnetization direction dependent spin Hall effect in ferromagnets
G. Qu, K. Nakamura, M. Hayashi
Phys. Rev. B 102, 144440 (2020).
10/27/2020

Publication: Superconducting properties of W thin films on topological insulators

Concomitance of superconducting spin–orbit scattering length and normal state spin diffusion length in W on (Bi,Sb)2Te3
Y.-C. Lau, R. Akiyama, H. T. Hirose, R. Nakanishi, T. Terashima, S. Uji, S. Hasegawa, M. Hayashi
J. Phys. Mater. 3, 034001 (2020).
4/30/2020

Hana Hirose and Takuya Kawada won the Unviersity of Tokyo, School of Science award!

Great work! Congratulations!!
3/23/2020

Publication: Giant spin orbit torque found in systems with Dirac electrons

The spin Hall effect of Bi-Sb alloys driven by thermally excited Dirac-like electrons
Z. Chi, Y.-C. Lau, X. Xu, T. Ohkubo, K. Hono, M. Hayashi
Science Advances, 6, eaay2324 (2020).
3/6/2020

Publication: Highly efficient spin orbit torque in sythetic antiferromagnets

Highly efficient spin-orbit torque in Pt/Co/Ir multilayers with antiferromagnetic interlayer exchange coupling
Y. Ishikuro, M. Kawaguchi, T. Taniguchi, M. Hayashi
Phys. Rev. B 101, 014404 (2020).
1/3/2020


2019

Takuya Kawada selected as the Finalist of the "Best student presentation award" at MMM!

Place: 64th Annual Conference on Magnetism and Magnetic Materials (MMM) at Las Vegas.
Title: Surface acoustic wave induced DC spin current in spin-orbit heterostructures.
Congratulations!
11/6/2019

Publication: Giant perpendicular magnetic anisotropy in Ir/Co/Pt multilayers

Giant perpendicular magnetic anisotropy in Ir/Co/Pt multilayers
Y.-C. Lau, Z. Chi, T. Taniguchi, M. Kawaguchi, G. Shibata, N. Kawamura, M. Suzuki, S. Fukami, A. Fujimori, H. Ohno, M. Hayashi
Phys. Rev. Mater. 3, 104419 (2019).
10/25/2019

Publication: DMI modulation with current

Current induced modulation of interfacial Dzyaloshinskii-Moriya interaction
N. Kato, M. Kawaguchi, Y.-C. Lau, T. Kikuchi, Y. Nakatani, M. Hayashi
Phys. Rev. Lett. 122, 257205 (2019).
6/28/2019

Publication: A giant acoustic planar Hall effect observed

Unidirectional planar Hall voltages induced by surface acoustic waves in ferromagnetic thin films
T. Kawada, M. Kawaguchi, M. Hayashi
Phys. Rev. B 99, 184435 (2019).
5/24/2019

Publication: DMI and spin orbit torque at the Ir/Co interface

Dzyaloshinskii-Moriya interaction and spin-orbit torque at the Ir/Co interface
Y. Ishikuro, M. Kawaguchi, N. Kato, Y.-C. Lau, M. Hayashi
Phys. Rev. B 99, 134421 (2019).
4/15/2019

Publication: Spin Hall effect from p-d hybridized orbitals in Co-Ga alloys

Spin Hall effect from 3d-4p hybridized orbitals
Y.-C. Lau, H. Lee, G. Qu, K. Nakamura, M. Hayashi
Phys. Rev. B 99, 064410 (2019).
2/12/2019


2018

Hana Hirose won the 45th JSAP young scientist presentation award!!

Place: The 79th Japan Applied Physics Society (JSAP) autumn meeting.
Title: Material dependence of interfacial spin-momentum locked bands in metallic heterostructures
Congratulations!
11/15/2018

Our paper was selected as a featured article!

Circular photogalvanic effect in Cu/Bi bilayers
H. Hirose, N. Ito, M. Kawaguchi, Y. C. Lau, M. Hayashi
Appl. Phys. Lett. 113, 222404 (2018).

See also Scilight for more information.
11/29/2018


Publication: Spin orbit induced photocurrent found in Bi/Cu bilayer

Circular photogalvanic effect in Cu/Bi bilayers
H. Hirose, N. Ito, M. Kawaguchi, Y. C. Lau, M. Hayashi
Appl. Phys. Lett. 113, 222404 (2018).
11/29/2018

Publication: Spin orbit torque detected optically

Optical Detection of Spin-Orbit Torque and Current-Induced Heating
Y. Marui, M. Kawaguchi, M. Hayashi
Appl. Phys. Express 11, 5 093001 (2018).
8/20/2018

Hana Hirose won the Best presentation award!

Hana Hirose won the Best presentation award at the Condensed Matter Physics Summer School.
Congratulations!
7/27/2018

Publication: Resistance of chiral domain walls

Domain-Wall Resistance in Cofeb-Based Heterostructures with Interface Dzyaloshinskii-Moriya Interaction
Y. Ishikuro, M. Kawaguchi, Y. C. Lau, Y. Nakatani, M. Hayashi
Appl. Phys. Express 11, 5 073001 (2018).
6/6/2018

Publication: Spin Hall magnetoresistance in Pt/Co bilayers

Anomalous Spin Hall Magnetoresistance in Pt/Co Bilayers
M. Kawaguchi, D. Towa, Y. C. Lau, S. Takahashi, M. Hayashi
Appl. Phys. Lett. 112, 5 202405 (2018).
5/16/2018

Naoaki Kato won the Unviersity of Tokyo, Faculty of Science award!

Great work! Congratulations!!
3/23/2018