[HTML][HTML] Semiconductor spintronics with Co2-Heusler compounds

K Hamaya, M Yamada - MRS Bulletin, 2022 - Springer
Abstract Ferromagnetic Co2-Heusler compounds showing high spin polarization have been
utilized as spin injectors and detectors for III–V and Group-IV semiconductors. In this article …

[HTML][HTML] Preparation and magnetic properties of Co2-based Heusler alloy glass-coated microwires with high Curie temperature

M Salaheldeen, M Ipatov, V Zhukova, A García-Gomez… - AIP Advances, 2023 - pubs.aip.org
In this article, we studied the effect of annealing (600 C for 1 h) and the applied magnetic
field from 50 Oe to 20 kOe of Co 2 FeSi glass-coated microwires with ordered L2 1 structure …

Giant Spin‐Valve Effect in Planar Spin Devices Using an Artificially Implemented Nanolength Mott‐Insulator Region

T Endo, S Tsuruoka, Y Tadano… - Advanced …, 2023 - Wiley Online Library
Developing technology to realize oxide‐based nanoscale planar integrated circuits is in
high demand for next‐generation multifunctional electronics. Oxide circuits can have a …

Effect of Strain on Room-Temperature Spin Transport in

T Naito, M Yamada, Y Wagatsuma, K Sawano… - Physical Review …, 2022 - APS
We report a strain effect on spin transport in semiconductors that exhibit Ge-like conduction
bands at room temperature. Using four-terminal nonlocal spin-transport measurements in …

Electrical properties of a low-temperature fabricated Ge-based top-gate MOSFET structure with epitaxial ferromagnetic Heusler-alloy Schottky-tunnel source and drain

K Yamamoto, T Matsuo, M Yamada… - Materials Science in …, 2023 - Elsevier
We show electrical properties of a Ge-based top-gate metal-oxide-semiconductor field-
effect transistor (MOSFET) structure with epitaxial ferromagnetic Heusler alloy/Ge Schottky …

Room-temperature two-terminal magnetoresistance ratio reaching 0.1% in semiconductor-based lateral devices with L21-ordered Co2MnSi

K Kudo, M Yamada, S Honda, Y Wagatsuma… - Applied Physics …, 2021 - pubs.aip.org
We report on the highest two-terminal magnetoresistance (MR) ratio at room temperature in
semiconductor-based lateral spin-valve devices. From first-principles calculations, we …

Magnetoresistance ratio of more than 1% at room temperature in germanium vertical spin-valve devices with Co2FeSi

A Yamada, M Yamada, M Honda, S Yamada… - Applied Physics …, 2021 - pubs.aip.org
We report the highest two-terminal magnetoresistance (MR) ratio at room temperature in
semiconductor (SC)-based vertical spin-valve (VSV) devices on a silicon (Si) platform. Here …

[HTML][HTML] Enhancement of room temperature electroluminescence from strained SiGe/Ge (111) multiple quantum wells light emitting diodes

S Kikuoka, R Kanesawa, M Yamada, K Hamaya… - Materials Science in …, 2024 - Elsevier
Abstract Epitaxially grown Ge-on-Si (111) based vertical type light-emitting diodes (LEDs)
including a single strained SiGe layer or strained SiGe/Ge multiple quantum wells (MQWs) …

[HTML][HTML] Effect of Sn doping on low-temperature growth of Ge epilayers on half-metallic Co2FeSi

M Yamada, S Kusumoto, A Yamada, K Sawano… - Materials Science in …, 2024 - Elsevier
In this study, we demonstrate the low-temperature growth of a Ge layer via Sn doping in a
ferromagnet/Ge/Co-based Heusler alloy multilayer on a Si (111) substrate having a vertically …

Half‐Metallic Heusler Alloy/GaN Heterostructure for Semiconductor Spintronics Devices

S Yamada, M Kato, S Ichikawa… - Advanced Electronic …, 2023 - Wiley Online Library
Because spin‐orbit coupling in wurtzite semiconductors is relatively weak compared with
that in zincblende ones, the III‐nitride semiconductor GaN is a promising material for high …