Spin-relaxation and magnetoresistance in FM/SC/FM tunnel junctions

S. Takahashi; T. Yamashita; H. Imamura; S. Maekawa

doi:10.1016/S0304-8853(01)00714-4

Spin-relaxation and magnetoresistance in FM/SC/FM tunnel junctions

S. Takahashi, T. Yamashita, H. Imamura, S. Maekawa

Materials Property Division

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

22 Citations (Scopus)

Abstract

The effect of spin relaxation on tunnel magnetoresistance (TMR) in a ferromagnet/superconductor/ferromagnet (FM/SC/FM) double tunnel junction is theoretically studied. The spin accumulation in SC is determined by balancing of the spin-injection rate and the spin-relaxation rate. In the superconducting state, the spin-relaxation time τ_s becomes longer with decreasing temperature, resulting in a rapid increase of TMR. The TMR of FM/SC/FM junctions provides a useful probe to extract information about spin-relaxation in superconductors.

Original language	English
Pages (from-to)	100-102
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	240
Issue number	1-3
DOIs	https://doi.org/10.1016/S0304-8853(01)00714-4
Publication status	Published - 2002 Feb

Keywords

Magnetoresistance
Spin injection
Spin-relaxation
Tunneling

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Spin-relaxation and magnetoresistance in FM/SC/FM tunnel junctions",

abstract = "The effect of spin relaxation on tunnel magnetoresistance (TMR) in a ferromagnet/superconductor/ferromagnet (FM/SC/FM) double tunnel junction is theoretically studied. The spin accumulation in SC is determined by balancing of the spin-injection rate and the spin-relaxation rate. In the superconducting state, the spin-relaxation time τs becomes longer with decreasing temperature, resulting in a rapid increase of TMR. The TMR of FM/SC/FM junctions provides a useful probe to extract information about spin-relaxation in superconductors.",

keywords = "Magnetoresistance, Spin injection, Spin-relaxation, Tunneling",

author = "S. Takahashi and T. Yamashita and H. Imamura and S. Maekawa",

note = "Funding Information: The authors are grateful to A. Fert and M. Johnson for fruitful discussions. A part of this work was done during a stay (S.T.) in CNRS/Thomson-CSF, France. This work is supported by a Grant-in-Aid for Scientific Research from Ministry of Education, Culture, Sports, Science and Technology, Japan. S.M. acknowledges the support of the Humboldt Foundation.",

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doi = "10.1016/S0304-8853(01)00714-4",

language = "English",

volume = "240",

pages = "100--102",

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T1 - Spin-relaxation and magnetoresistance in FM/SC/FM tunnel junctions

AU - Takahashi, S.

AU - Yamashita, T.

AU - Imamura, H.

AU - Maekawa, S.

N1 - Funding Information: The authors are grateful to A. Fert and M. Johnson for fruitful discussions. A part of this work was done during a stay (S.T.) in CNRS/Thomson-CSF, France. This work is supported by a Grant-in-Aid for Scientific Research from Ministry of Education, Culture, Sports, Science and Technology, Japan. S.M. acknowledges the support of the Humboldt Foundation.

PY - 2002/2

Y1 - 2002/2

N2 - The effect of spin relaxation on tunnel magnetoresistance (TMR) in a ferromagnet/superconductor/ferromagnet (FM/SC/FM) double tunnel junction is theoretically studied. The spin accumulation in SC is determined by balancing of the spin-injection rate and the spin-relaxation rate. In the superconducting state, the spin-relaxation time τs becomes longer with decreasing temperature, resulting in a rapid increase of TMR. The TMR of FM/SC/FM junctions provides a useful probe to extract information about spin-relaxation in superconductors.

AB - The effect of spin relaxation on tunnel magnetoresistance (TMR) in a ferromagnet/superconductor/ferromagnet (FM/SC/FM) double tunnel junction is theoretically studied. The spin accumulation in SC is determined by balancing of the spin-injection rate and the spin-relaxation rate. In the superconducting state, the spin-relaxation time τs becomes longer with decreasing temperature, resulting in a rapid increase of TMR. The TMR of FM/SC/FM junctions provides a useful probe to extract information about spin-relaxation in superconductors.

KW - Magnetoresistance

KW - Spin injection

KW - Spin-relaxation

KW - Tunneling

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U2 - 10.1016/S0304-8853(01)00714-4

DO - 10.1016/S0304-8853(01)00714-4

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AN - SCOPUS:0036465497

VL - 240

SP - 100

EP - 102

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 1-3

ER -

Spin-relaxation and magnetoresistance in FM/SC/FM tunnel junctions

Abstract

Keywords

ASJC Scopus subject areas

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