92 citations · 297 across the 16 of their papers we have counts for
16 papers
Giant staggered Dzyaloshinskii-Moriya vectors emerged in synthetic antiferromagnets with spatially alternating stress
Yuuga Iwata, Kensuke Hayashi, Reiju Furumaki +3
Dzyaloshinskii-Moriya (DM) interaction is a source of chiral magnetic physics, and it manifests microstructural symmetry which could link to exotic magnetic and electronic properti…
Stability-threshold control of helicity-selective antiferromagnetic resonance
Masato Todani, Satoshi Iihama, Yuto Moritake +1
We study helicity-selective antiferromagnetic resonance in an antiferromagnetic-insulator/nonmagnetic-metal junction with sublattice-dependent damping and spin-orbit torque. By for…
Distinct memory properties in spin-wave reservoir computing based on synthetic antiferromagnet
Takumu Shinkai, Satoshi Iihama, Kensuke Hayashi +3
Spin-wave-based physical reservoir computing (RC) is a promising candidate for energy-efficient physical implementations of artificial intelligence because of its potential for nan…
Single-Shot Magnetization Reversal in Ferromagnetic Spin Valves Enabled via Heat Control
Kazuaki Ishibashi, Junta Igarashi, Alberto Anadón +7
We study laser induced ultrafast magnetization reversal in a ferromagnetic spin valve by comparing the effects of direct laser excitation and ultrashort hot electron pulses. A wedg…
Light-induced torque in ferromagnetic metals via orbital angular momentum generated by photon-helicity
Koki Nukui, Satoshi Iihama, Kazuaki Ishibashi +7
We investigated photon-helicity-induced magnetization precession in CoPt alloy thin films. In addition to field-like torque, attributable to magnetic field generation…
Universal scaling between wave speed and size enables nanoscale high-performance reservoir computing based on propagating spin-waves
Satoshi Iihama, Yuya Koike, Shigemi Mizukami +1
Neuromorphic computing using spin waves is promising for high-speed nanoscale devices, but the realization of high performance has not yet been achieved. Here we show, using microm…
Different spin relaxation property observed in linearly and circularly polarized laser induced terahertz emission from Bi/Co bilayer
Kazuaki Ishibashi, Satoshi Iihama, Shigemi Mizukami
Recently, helicity-dependent photocurrent was reported in Bi single thin fi lms. It is proposed that the origin of this photocurrent is the combination of photo-spin conversion and…
Enhancement of Spin-Charge Conversion Efficiency for CoSnS across Transition from Paramagnetic to Ferromagnetic Phase
Takeshi Seki, Yong-Chang Lau, Junya Ikeda +5
CoSnS (CSS) is one of the shandite compounds and becomes a magnetic Weyl semimetal candidate below the ferromagnetic phase transition temperature ($\textit{T}_\te…
Giant effective damping of octupole oscillation in an antiferromagnetic Weyl semimetal
Shinji Miwa, Satoshi Iihama, Takuya Nomoto +8
A magnetic Weyl semimetal is a recent focus of extensive research as it may exhibit large and robust transport phenomena associated with topologically protected Weyl points in mome…
Parity-controlled spin-wave excitations in synthetic antiferromagnets
A. Sud, Y. Koike, S. Iihama +3
We report in this study the current-induced-torque excitation of acoustic and optical modes in Ta/NiFe/Ru/NiFe/Ta synthetic antiferromagnet stacks grown on SiO2/Si substrates. The…
Spin injection characteristics of Py/graphene/Pt by gigahertz and terahertz magnetization dynamics driven by femtosecond laser pulse
H. Idzuchi, S. Iihama, M. Shimura +3
Spin transport characteristics of graphene has been extensively studied so far. The spin transport along c-axis is however reported by rather limited number of papers. We have stud…
Interface-induced field-like optical spin torque in a ferromagnet/heavy metal heterostructure
Satoshi Iihama, Kazuaki Ishibashi, Shigemi Mizukami
The manipulation of magnetization in a metallic ferromagnet by using optical helicity has been much attracted attention for future opto-spintronic devices. The optical helicity ind…
Tunable magnon-magnon coupling in synthetic antiferromagnets
A. Sud, C. W. Zollitsch, A. Kamimaki +5
In this work, we study magnon-magnon coupling in synthetic antiferromagnets (SyAFs) using microwave spectroscopy at room temperature. Two distinct spin-wave modes are clearly obser…
Large Spin Anomalous Hall Effect in L1-FePt: Symmetry and Magnetization Switching
Takeshi Seki, Satoshi Iihama, Tomohiro Taniguchi +1
We quantitatively evaluate a spin anomalous Hall effect (SAHE), generating spin angular momentum flow (spin current, ), in an L1-FePt ferromagnet by exploiting…
Single-shot multi-level all-optical magnetization switching mediated by spin-polarized hot electron transport
S. Iihama, Y. Xu, M. Deb +5
All-optical ultrafast magnetization switching in magnetic material thin film without the assistance of an applied external magnetic field is being explored for future ultrafast and…
Laser-induced THz magnetization precession for a tetragonal Heusler-like nearly compensated ferrimagnet
S. Mizukami, A. Sugihara, S. Iihama +3
Laser-induced magnetization precessional dynamics was investigated in epitaxial films of MnGe, which is a tetragonal Heusler-like nearly compensated ferrimagnet. The ferromagne…