Spin-transfer mechanism for magnon-drag thermopower

Details Spin-transfer mechanism for magnon-drag thermopower Spin-transfer mechanism for magnon-drag thermopower

2011-09-12

arxiv.org/abs/1109.2414v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We point out a relation between the dissipative spin-transfer-torque parameter $\beta$ and the contribution of magnon drag to the thermoelectric power in conducting ferromagnets. Using this result we estimate $\beta$ in iron at low temperatures, where magnon drag is believed to be the dominant contribution to the thermopower. Our results may be used to determine $\beta$ from magnon-drag-thermopower experiments, or, conversely, to infer the strength of magnon drag via experiments on spin transfer.

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