Spin Absorption Effect at Ferromagnet/Ge Schottky-Tunnel Contacts

Spin Absorption Effect at Ferromagnet/Ge Schottky-Tunnel Contacts

We study the influence of the junction size in ferromagnet (FM)/semiconductor (SC) contacts on four-terminal nonlocal spin signals in SC-based lateral spin-valve (LSV) structures. When we use FM/Ge Schottky-tunnel junctions with relatively low resistance-area products, the magnitude of the nonlocal...

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Main Authors: Michihiro Yamada, Yuichi Fujita, Shinya Yamada, Kentarou Sawano, Kohei Hamaya
Format: Article
Language:English
Published: MDPI AG 2018-01-01
Series:Materials
Subjects:
semiconductor spintronics
germanium
spin absorption
Online Access:http://www.mdpi.com/1996-1944/11/1/150
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spelling doaj-d268461c626845e49b7a8523395ac3f12020-11-24T23:54:02ZengMDPI AGMaterials1996-19442018-01-0111115010.3390/ma11010150ma11010150Spin Absorption Effect at Ferromagnet/Ge Schottky-Tunnel ContactsMichihiro Yamada0Yuichi Fujita1Shinya Yamada2Kentarou Sawano3Kohei Hamaya4Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka 560-8531, JapanGraduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka 560-8531, JapanGraduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka 560-8531, JapanAdvanced Research Laboratories, Tokyo City University, 8-15-1 Todoroki, Tokyo 158-0082, JapanGraduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka 560-8531, JapanWe study the influence of the junction size in ferromagnet (FM)/semiconductor (SC) contacts on four-terminal nonlocal spin signals in SC-based lateral spin-valve (LSV) structures. When we use FM/Ge Schottky-tunnel junctions with relatively low resistance-area products, the magnitude of the nonlocal spin signal depends clearly on the junction size, indicating the presence of the spin absorption effect at the spin-injector contact. The temperature-dependent spin signal can also be affected by the spin absorption effect. For SC spintronic applications with a low parasitic resistance, we should consider the influence of the spin absorption on the spin-transport signals in SC-based device structures.http://www.mdpi.com/1996-1944/11/1/150semiconductor spintronicsgermaniumspin absorption
collection DOAJ
language English
format Article
sources DOAJ
author Michihiro Yamada
Yuichi Fujita
Shinya Yamada
Kentarou Sawano
Kohei Hamaya
spellingShingle Michihiro Yamada
Yuichi Fujita
Shinya Yamada
Kentarou Sawano
Kohei Hamaya
Spin Absorption Effect at Ferromagnet/Ge Schottky-Tunnel Contacts
Materials
semiconductor spintronics
germanium
spin absorption
author_facet Michihiro Yamada
Yuichi Fujita
Shinya Yamada
Kentarou Sawano
Kohei Hamaya
author_sort Michihiro Yamada
title Spin Absorption Effect at Ferromagnet/Ge Schottky-Tunnel Contacts
title_short Spin Absorption Effect at Ferromagnet/Ge Schottky-Tunnel Contacts
title_full Spin Absorption Effect at Ferromagnet/Ge Schottky-Tunnel Contacts
title_fullStr Spin Absorption Effect at Ferromagnet/Ge Schottky-Tunnel Contacts
title_full_unstemmed Spin Absorption Effect at Ferromagnet/Ge Schottky-Tunnel Contacts
title_sort spin absorption effect at ferromagnet/ge schottky-tunnel contacts
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2018-01-01
description We study the influence of the junction size in ferromagnet (FM)/semiconductor (SC) contacts on four-terminal nonlocal spin signals in SC-based lateral spin-valve (LSV) structures. When we use FM/Ge Schottky-tunnel junctions with relatively low resistance-area products, the magnitude of the nonlocal spin signal depends clearly on the junction size, indicating the presence of the spin absorption effect at the spin-injector contact. The temperature-dependent spin signal can also be affected by the spin absorption effect. For SC spintronic applications with a low parasitic resistance, we should consider the influence of the spin absorption on the spin-transport signals in SC-based device structures.
topic semiconductor spintronics
germanium
spin absorption
url http://www.mdpi.com/1996-1944/11/1/150
work_keys_str_mv AT michihiroyamada spinabsorptioneffectatferromagnetgeschottkytunnelcontacts
AT yuichifujita spinabsorptioneffectatferromagnetgeschottkytunnelcontacts
AT shinyayamada spinabsorptioneffectatferromagnetgeschottkytunnelcontacts
AT kentarousawano spinabsorptioneffectatferromagnetgeschottkytunnelcontacts
AT koheihamaya spinabsorptioneffectatferromagnetgeschottkytunnelcontacts
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