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

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

Research output: Contribution to journalArticlepeer-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 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.

Original languageEnglish
Pages (from-to)100-102
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume240
Issue number1-3
DOIs
Publication statusPublished - 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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