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

Saburo Takahashi·Taro Yamashita·Hiroshi Imamura·Sadamichi Maekawa
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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 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.

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Saburo Takahashi, Taro Yamashita, Hiroshi Imamura, Sadamichi Maekawa. 2001-07-19. Spin-relaxation and magnetoresistance in FM/SC/FM tunnel junctions. https://doi.org/10.1016/s0304-8853(01)00714-4

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