期刊
PHYSICAL REVIEW B
卷 79, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.174401
关键词
interface magnetism; magnetic tunnelling; magnons; spin polarised transport
资金
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0854641] Funding Source: National Science Foundation
The role of interfacial electron-magnon interaction in a noncollinear magnetic tunnel junction is investigated using the transfer Hamiltonian method. It is shown that the interfacial electron-magnon scattering modifies the bias dependence of both components of the spin-transfer torque. In particular, we find that at low temperature, the magnons emission adds a quadratic contribution and at finite temperature, both quadratic and linear terms appear. These contributions can explain recent experimental results on the bias dependence of spin-transfer torque.
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