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

Gyung Min Choi, Chul Hyun Moon, Byoung Chul Min, Kyung Jin Lee, David G. Cahill

Research output: Contribution to journalArticle

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 effect (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.

Original languageEnglish (US)
Pages (from-to)576-581
Number of pages6
JournalNature Physics
Volume11
Issue number7
DOIs
StatePublished - Jul 1 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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