Spin-dependent coulomb blockade in ferromagnet/normal-metal/ferromagnet double tunnel junctions

Hiroshi Imamura, Saburo Takahashi, Sadamichi Maekawa

研究成果: Article査読

84 被引用数 (Scopus)

抄録

We study theoretically the spin-dependent transport in ferromagnet/normal-metal/ferromagnet double tunnel junctions by special attention to cotunneling in the Coulomb blockade region. The spin accumulation caused by cotunneling squeezes the Coulomb blockade region when the magnetizations in the ferromagnetic electrodes are antiparallel. Outside the squeezed Coulomb blockade region, we propose an anomalous region where the sequential tunneling in one of the spin bands is suppressed by the Coulomb blockade and that in the other is not. In this region, the tunnel magnetoresistance oscillates as a function of bias voltage. The temperature dependences of the tunnel magnetoresistance and the magnitude of the spin accumulation are calculated.

本文言語English
ページ(範囲)6017-6020
ページ数4
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
59
9
DOI
出版ステータスPublished - 1999

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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