Andreev reflection in ferromagnet/superconductor/ferromagnet double junction systems

Taro Yamashita, Hiroshi Imamura, Saburo Takahashi, Sadamichi Maekawa

研究成果: Article査読

61 被引用数 (Scopus)

抄録

We present a theory of Andreev reflection in a ferromagnet/superconductor/ferromagnet double junction system. In the Andreev reflection process, the injected spin polarized quasiparticles convert into Cooper pairs in the superconductor within the range of the penetration depth from the interface. When the thickness of the superconductor is smaller than or comparable to the penetration depth, the spin polarized quasiparticles pass through the superconductor and therefore the electric current depends on the relative orientation of magnetizations of the ferromagnets. The dependences of the magnetoresistance on the thickness of the superconductor, temperature, the exchange field of the ferromagnets, and the height of the interfacial barriers are analyzed. Our theory explains recent experimental results well.

本文言語English
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
67
9
DOI
出版ステータスPublished - 2003 3月 31

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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