Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves

Title
Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves
Authors
최경민문철현민병철이경진David G. Cahill
Issue Date
2015-07
Publisher
Nature physics
Citation
VOL 11, 576-581
Abstract
The coupling of spin and heat gives rise to new physical phenomena in nanoscale spin devices. In particular, spin-transfer torque (STT) driven by thermal transport provides a new way to manipulate local magnetization.We quantify thermal STT in metallic spin-valve structures using an intense and ultrafast heat current created by picosecond pulses of laser light. Our result shows that thermal STT consists of demagnetization-driven and spin-dependent Seebeck e ect (SDSE)-driven components; the SDSE-driven STT becomes dominant after 3 ps. The sign and magnitude of the SDSE-driven STT can be controlled by the composition of a ferromagnetic layer and the thickness of a heat sink layer.
URI
http://pubs.kist.re.kr/handle/201004/50102
ISSN
17452473
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KIST Publication > Article
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