108 citations · 451 across the 20 of their papers we have counts for
20 papers
Fe contribution to the magnetic anisotropy of -ordered FePt thin films studied by angle-dependent x-ray magnetic circular dichroism
Goro Shibata, Keisuke Ikeda, Takeshi Seki +9
Among magnetic thin films with perpendicular magnetic anisotropy (PMA), -ordered FePt has attracted significant attention because of its exceptionally strong PMA. However, th…
Gate-tunable spin Hall effect in an all-light-element heterostructure: graphene with copper oxide
Haozhe Yang, Maider Ormaza, Zhendong Chi +10
Graphene is a light material for long-distance spin transport due to its low spin-orbit coupling, which at the same time is the main drawback to exhibit a sizeable spin Hall effect…
Origin of magnetically dead layers in spinel ferrites grown on : Effects of post-deposition annealing studied by XMCD
Yosuke Nonaka, Yuki K. Wakabayashi, Goro Shibata +8
We study the electronic and magnetic states of as-grown and annealed (111)/(111) () thin films with various thicknes…
Unconventional charge-to-spin conversions in graphene/MoTe2 van der Waals heterostructures
Nerea Ontoso, C. K. Safeer, Franz Herling +9
Spin-charge interconversion (SCI) is a central phenomenon to the development of spintronic devices from materials with strong spin-orbit coupling (SOC). In the case of materials wi…
Charge-to-spin conversion in twisted graphene/WSe heterostructures
Seungjun Lee, D. J. P. de Sousa, Young-Kyun Kwon +4
We investigate the twist angle dependence of spin-orbit coupling (SOC) proximity effects and charge-to-spin conversion (CSC) in graphene/WSe heterostructures from first princip…
Spin Hall effect driven by the spin magnetic moment current in Dirac materials
Zhendong Chi, Guanxiong Qu, Yong-Chang Lau +5
The spin Hall effect of a Dirac Hamiltonian system is studied using semiclassical analyses and the Kubo formula. In this system, the spin Hall conductivity is dependent on the defi…
Magnetic anisotropy of the van der Waals ferromagnet CrGeTe studied by angular-dependent XMCD
M. Suzuki, B. Gao, G. Shibata +12
The van der Waals ferromagnet CrGeTe (CGT) has a two-dimensional crystal structure where each layer is stacked through van der Waals force. We have investigated the nat…
Reduced magnetocrystalline anisotropy of CoFeO thin films studied by angle-dependent x-ray magnetic circular dichroism
Yosuke Nonaka, Yuki K. Wakabayashi, Goro Shibata +9
Spinel-type CoFeO is a ferrimagnetic insulator with the Néel temperature exceeding 790 K, and shows a strong cubic magnetocrystalline anisotropy (MCA) in bulk materials. Ho…
On the relationship between orbital moment anisotropy, magnetocrystalline anisotropy, and Dzyaloshinskii-Moriya interaction in W/Co/Pt trilayers
Zhendong Chi, Yong-Chang Lau, Vanessa Li Zhang +15
We have studied the Co layer thickness dependences of magnetocrystalline anisotropy (MCA), Dzyaloshinskii-Moriya interaction (DMI), and orbital moment anisotropy (OMA) in W/Co/Pt t…
Interface enhanced helicity dependent photocurrent in metal/semimetal bilayers
H. Hirose, M. Kawaguchi, Y. -C. Lau +2
One of the hallmarks of light-spin interaction in solids is the appearance of photocurrent that depends on the light helicity. Recent studies have shown that helicity dependent pho…
Anisotropic spin distribution and perpendicular magnetic anisotropy in the layered ferromagnetic semiconductor (Ba,K)(Zn,Mn)As
Shoya Sakamoto, Guoqiang Zhao, Goro Shibata +14
Perpendicular magnetic anisotropy of the new ferromagnetic semiconductor (Ba,K)(Zn,Mn)As is studied by angle-dependent x-ray magnetic circular dichroism measurements. T…
Giant inverse Faraday effect in Dirac semimetals
Masashi Kawaguchi, Hana Hirose, Zhendong Chi +3
We have studied helicity dependent photocurrent (HDP) in Bi-based Dirac semimetal thin films. HDP increases with film thickness before it saturates, changes its sign when the major…
The spin Hall effect of Bi-Sb alloys driven by thermally excited Dirac-like electrons
Zhendong Chi, Yong-Chang Lau, Xiandong Xu +3
We have studied the charge to spin conversion in BiSb/CoFeB heterostructures. The spin Hall conductivity (SHC) of the sputter deposited heterostructures exhibits a high…
Giant perpendicular magnetic anisotropy in Ir/Co/Pt multilayers
Yong-Chang Lau, Zhendong Chi, Tomohiro Taniguchi +8
We have studied the magnetic properties of multilayers composed of ferromagnetic metal Co and heavy metals with strong spin orbit coupling (Pt and Ir). Multilayers with symmetric (…
Magnetization process of the insulating ferromagnetic semiconductor (Al,Fe)Sb
Shoya Sakamoto, Le Duc Anh, Pham Nam Hai +12
We have studied the magnetization process of the new insulating ferromagnetic semiconductor (Al,Fe)Sb by means of x-ray magnetic circular dichroism. For an optimally doped sample w…
Systematic study of the electronic structure and the magnetic properties of a few-nm-thick epitaxial (Ni1-xCox)Fe2O4 (x = 0 - 1) layers grown on Al2O3(111)/Si(111) using soft X-ray magnetic circular dichroism: effects of cation distribution
Yuki K. Wakabayashi, Yosuke Nonaka, Yukiharu Takeda +10
We study the electronic structure and the magnetic properties of epitaxial (Ni1-xCox)Fe2O4(111) layers (x = 0 - 1) with thicknesses d = 1.7 - 5.2 nm grown on Al2O3(111)/Si(111) str…
Electronic States and Possible Origin of the Orbital-Glass State in a Nearly Metallic Spinel Cobalt Vanadate: An X-ray Magnetic Circular Dichroism Study
Yosuke Nonaka, Goro Shibata, Rui Koborinai +8
We have investigated the orbital states of the orbital-glassy (short-range orbital ordered) spinel vanadate CoVO using x-ray absorption spectroscopy (XAS),…
Effect(s) of Cobalt Substitution in -(Fe,Co)Pt Thin Films
Shoya Sakamoto, Kumar Srinivasan, Rui Zhang +9
We have studied the effect of cobalt substitution in -FeCoPt films by means of x-ray magnetic circular dichroism (XMCD) and first-principles calculations. The…
Anisotropic spin-density distribution and magnetic anisotropy of strained LaSrMnO thin films: Angle-dependent x-ray magnetic circular dichroism
G. Shibata, M. Kitamura, M. Minohara +21
Magnetic anisotropies of ferromagnetic thin films are induced by epitaxial strain from the substrate via strain-induced anisotropy in the orbital magnetic moment and that in the sp…
Electronic structure and magnetic properties of magnetically dead layers in epitaxial CoFe2O4/Al2O3/Si(111) films studied by X-ray magnetic circular dichroism
Yuki K. Wakabayashi, Yosuke Nonaka, Yukiharu Takeda +10
Epitaxial CoFe2O4/Al2O3 bilayers are expected to be highly efficient spin injectors into Si owing to the spin filter effect of CoFe2O4. To exploit the full potential of this system…