Large spatial distribution of spin accumulation in wide Au channel

Jang Hae Ku; Hyun Cheol Koo; Suk Hee Han; Jonghwa Eom; Gyutae Kim; Joonyeon Chang

doi:10.1016/j.sse.2013.06.012

Large spatial distribution of spin accumulation in wide Au channel

Jang Hae Ku, Hyun Cheol Koo, Suk Hee Han, Jonghwa Eom, Gyutae Kim, Joonyeon Chang

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Non local spin valve measurements for lateral Permalloy(Py)/Au/Py spin valve devices with various Au channel widths were carried out in two viable voltage probe configurations. With increasing the channel width at a fixed channel length, the magnitude of spin valve signal (ΔR) decays for both configurations. Non-zero ΔR is observed up to 3 μm in width while no spin signal is observed even narrower width of 0.7 μm when the current and voltage probes are located on the same side or opposite side with respect to the current path respectively. The magnitude of ΔR is strongly affected by the location of voltage probe on both ends of the detector as well as channel width. Large spatial distribution of spin current is initiated from inhomogeneous spin injection close to the current path and can be well understood by introducing the effective channel length.

Original language	English
Pages (from-to)	72-75
Number of pages	4
Journal	Solid-State Electronics
Volume	89
DOIs	https://doi.org/10.1016/j.sse.2013.06.012
Publication status	Published - 2013

Bibliographical note

Funding Information:
This work was supported by KIST Institutional program (2E22402, 2V02720) and the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MEST) (No. 2012-0005631).

Keywords

Non-local measurement
Spin accumulation
Spin injection
Spin valve device

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/j.sse.2013.06.012

Cite this

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title = "Large spatial distribution of spin accumulation in wide Au channel",

abstract = "Non local spin valve measurements for lateral Permalloy(Py)/Au/Py spin valve devices with various Au channel widths were carried out in two viable voltage probe configurations. With increasing the channel width at a fixed channel length, the magnitude of spin valve signal (ΔR) decays for both configurations. Non-zero ΔR is observed up to 3 μm in width while no spin signal is observed even narrower width of 0.7 μm when the current and voltage probes are located on the same side or opposite side with respect to the current path respectively. The magnitude of ΔR is strongly affected by the location of voltage probe on both ends of the detector as well as channel width. Large spatial distribution of spin current is initiated from inhomogeneous spin injection close to the current path and can be well understood by introducing the effective channel length.",

keywords = "Non-local measurement, Spin accumulation, Spin injection, Spin valve device",

author = "Ku, {Jang Hae} and Koo, {Hyun Cheol} and Han, {Suk Hee} and Jonghwa Eom and Gyutae Kim and Joonyeon Chang",

note = "Funding Information: This work was supported by KIST Institutional program (2E22402, 2V02720) and the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MEST) (No. 2012-0005631).",

year = "2013",

doi = "10.1016/j.sse.2013.06.012",

language = "English",

volume = "89",

pages = "72--75",

journal = "Solid-State Electronics",

issn = "0038-1101",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Large spatial distribution of spin accumulation in wide Au channel

AU - Ku, Jang Hae

AU - Koo, Hyun Cheol

AU - Han, Suk Hee

AU - Eom, Jonghwa

AU - Kim, Gyutae

AU - Chang, Joonyeon

N1 - Funding Information: This work was supported by KIST Institutional program (2E22402, 2V02720) and the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MEST) (No. 2012-0005631).

PY - 2013

Y1 - 2013

N2 - Non local spin valve measurements for lateral Permalloy(Py)/Au/Py spin valve devices with various Au channel widths were carried out in two viable voltage probe configurations. With increasing the channel width at a fixed channel length, the magnitude of spin valve signal (ΔR) decays for both configurations. Non-zero ΔR is observed up to 3 μm in width while no spin signal is observed even narrower width of 0.7 μm when the current and voltage probes are located on the same side or opposite side with respect to the current path respectively. The magnitude of ΔR is strongly affected by the location of voltage probe on both ends of the detector as well as channel width. Large spatial distribution of spin current is initiated from inhomogeneous spin injection close to the current path and can be well understood by introducing the effective channel length.

AB - Non local spin valve measurements for lateral Permalloy(Py)/Au/Py spin valve devices with various Au channel widths were carried out in two viable voltage probe configurations. With increasing the channel width at a fixed channel length, the magnitude of spin valve signal (ΔR) decays for both configurations. Non-zero ΔR is observed up to 3 μm in width while no spin signal is observed even narrower width of 0.7 μm when the current and voltage probes are located on the same side or opposite side with respect to the current path respectively. The magnitude of ΔR is strongly affected by the location of voltage probe on both ends of the detector as well as channel width. Large spatial distribution of spin current is initiated from inhomogeneous spin injection close to the current path and can be well understood by introducing the effective channel length.

KW - Non-local measurement

KW - Spin accumulation

KW - Spin injection

KW - Spin valve device

UR - http://www.scopus.com/inward/record.url?scp=84881277266&partnerID=8YFLogxK

U2 - 10.1016/j.sse.2013.06.012

DO - 10.1016/j.sse.2013.06.012

M3 - Article

AN - SCOPUS:84881277266

SN - 0038-1101

VL - 89

SP - 72

EP - 75

JO - Solid-State Electronics

JF - Solid-State Electronics

ER -

Large spatial distribution of spin accumulation in wide Au channel

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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