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

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

Research output: Contribution to journalArticle

68 Citations (Scopus)

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
Pages (from-to)576-581
Number of pages6
JournalNature Physics
Volume11
Issue number7
DOIs
Publication statusPublished - 2015 Jul 1

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Seebeck effect
torque
heat
picosecond pulses
heat sinks
demagnetization
magnetization

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves. / Choi, Gyung Min; Moon, Chul Hyun; Min, Byoung Chul; Lee, Kyoung Jin; Cahill, David G.

In: Nature Physics, Vol. 11, No. 7, 01.07.2015, p. 576-581.

Research output: Contribution to journalArticle

Choi, Gyung Min ; Moon, Chul Hyun ; Min, Byoung Chul ; Lee, Kyoung Jin ; Cahill, David G. / Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves. In: Nature Physics. 2015 ; Vol. 11, No. 7. pp. 576-581.
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