1. Spin-flip scattering effect on the current-induced spin torque in ferromagnet–insulator–ferromagnet tunnel junctions
- Author
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Zhu, Zhen-Gang, Su, Gang, Jin, Biao, and Zheng, Qing-Rong
- Subjects
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SCATTERING (Physics) , *TORQUE - Abstract
We have investigated the current-induced spin transfer torque of a ferromagnet–insulator–ferromagnet tunnel junction by taking the spin-flip scatterings into account. It is found that the spin-flip scattering can induce an additional spin torque, enhancing the maximum of the spin torque and giving rise to an angular shift compared to the case when the spin-flip scatterings are neglected. The effects of the molecular fields of the left and right ferromagnets on the spin torque are also studied. It is found that
τRx/Ie (τRx is the spin-transfer torque acting on the right ferromagnet andIe is the tunneling electrical current) does vary with the molecular fields. At two certain angles,τRx/Ie is independent of the molecular field of the right ferromagnet, resulting in two crossing points in the curve ofτRx/Ie versus the relevant orientation for different molecular fields. [Copyright &y& Elsevier]- Published
- 2003
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