科研之友
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摘要
We propose analytic expressions for fieldlike, T-perpendicular to, and spin-transfer, T-parallel to,T- spin torque components in the spin-filter-based magnetic tunnel junction (SFMTJ), by using the single-band tight-binding model with the nonequilibrium Keldysh formalism. In consideration of multireflection processes between noncollinear magnetization of the spin-filter (SF) barrier and the ferromagnetic (FM) electrode, the central spin-selective SF barrier plays an active role in the striking discovery T-perpendicular to >> T-parallel to,T- which can be further identified by the unusual barrier thickness dependence of giant T-perpendicular to. Our general expressions reveal the sinusoidal angular dependence of both spin torque components, even in the presence of the SF barrier.
- 出版日期2017-8-24
- 单位中央民族大学
