Journal of the Korean Magnetics Society (한국자기학회지)

The Korean Magnetics Society (한국자기학회)
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Diffusion Theory of Spin Injection

스핀 주입에 대한 퍼짐 이론

  • Lee, B.C. (Department of Physics, Inha University)
  • Published : 2006.04.01
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Abstract

The diffusion theory for spin injection from magnetic layer into nonmagnetic layer was reviewed. Basic equations were derived and applied to a ferromagnet/semiconductor/ferromagnet system. The spin polarization and magnetoresistance were calculated. The reason for difficulty in detecting spin injection with magnetoresistance was explained, and a possible solution was discussed.

자성체에서 비자성체로의 스핀주입(spin injection)을 설명하는 퍼짐이론(diffusion theory)에 대해서 살펴보았다. 먼저 기본 방정식을 유도하고, 그것을 강자성체/비자성체/강자성체 구조에 적용시켜, 스핀극나뉨과 자기저항을 구하였다. 주입된 스핀극나뉨 전류를 자기저항으로 검출하기 어려운 물리적 이유를 설명하고, 그 해결 방안에 대해서 논의하였다.

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