Seebeck effect in nanomagnets

Dmitry V. Fedorov; Martin Gradhand; Katarina Tauber; Gerrit E. W. Bauer; Ingrid Mertig

doi:10.1088/1361-648X/ac3b26

Seebeck effect in nanomagnets

Dmitry V. Fedorov, Martin Gradhand^*, Katarina Tauber, Gerrit E. W. Bauer, Ingrid Mertig

^*Corresponding author for this work

School of Physics

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Abstract

We present a theory of the Seebeck effect in nanomagnets with dimensions smaller than the spin diffusion length, showing that the spin accumulation generated by a temperature gradient strongly affects the thermopower. We also identify a correction arising from the transverse temperature gradient induced by the anomalous Ettingshausen effect and an induced spin-heat accumulation gradient. The relevance of these effects for nanoscale magnets is illustrated by ab initio calculations on dilute magnetic alloys.

Original language	English
Article number	085801
Number of pages	6
Journal	Journal of Physics Condensed Matter
Volume	34
Issue number	8
DOIs	https://doi.org/10.1088/1361-648X/ac3b26
Publication status	Published - 2 Dec 2021

Bibliographical note

Publisher Copyright:
© 2021 The Author(s). Published by IOP Publishing Ltd.

Keywords

spin-dependent transport
transverse transport
spin–orbit coupling
Seebeck effect
DFT
Boltzmann equation
semiclassical transport

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10.1088/1361-648X/ac3b26

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title = "Seebeck effect in nanomagnets",

abstract = "We present a theory of the Seebeck effect in nanomagnets with dimensions smaller than the spin diffusion length, showing that the spin accumulation generated by a temperature gradient strongly affects the thermopower. We also identify a correction arising from the transverse temperature gradient induced by the anomalous Ettingshausen effect and an induced spin-heat accumulation gradient. The relevance of these effects for nanoscale magnets is illustrated by ab initio calculations on dilute magnetic alloys.",

keywords = "spin-dependent transport, transverse transport, spin–orbit coupling, Seebeck effect, DFT, Boltzmann equation, semiclassical transport",

author = "Fedorov, {Dmitry V.} and Martin Gradhand and Katarina Tauber and Bauer, {Gerrit E. W.} and Ingrid Mertig",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s). Published by IOP Publishing Ltd.",

year = "2021",

month = dec,

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doi = "10.1088/1361-648X/ac3b26",

language = "English",

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T1 - Seebeck effect in nanomagnets

AU - Fedorov, Dmitry V.

AU - Gradhand, Martin

AU - Tauber, Katarina

AU - Bauer, Gerrit E. W.

AU - Mertig, Ingrid

PY - 2021/12/2

Y1 - 2021/12/2

N2 - We present a theory of the Seebeck effect in nanomagnets with dimensions smaller than the spin diffusion length, showing that the spin accumulation generated by a temperature gradient strongly affects the thermopower. We also identify a correction arising from the transverse temperature gradient induced by the anomalous Ettingshausen effect and an induced spin-heat accumulation gradient. The relevance of these effects for nanoscale magnets is illustrated by ab initio calculations on dilute magnetic alloys.

AB - We present a theory of the Seebeck effect in nanomagnets with dimensions smaller than the spin diffusion length, showing that the spin accumulation generated by a temperature gradient strongly affects the thermopower. We also identify a correction arising from the transverse temperature gradient induced by the anomalous Ettingshausen effect and an induced spin-heat accumulation gradient. The relevance of these effects for nanoscale magnets is illustrated by ab initio calculations on dilute magnetic alloys.

KW - spin-dependent transport

KW - transverse transport

KW - spin–orbit coupling

KW - Seebeck effect

KW - DFT

KW - Boltzmann equation

KW - semiclassical transport

U2 - 10.1088/1361-648X/ac3b26

DO - 10.1088/1361-648X/ac3b26

M3 - Article (Academic Journal)

C2 - 34794125

VL - 34

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 8

M1 - 085801

ER -

Seebeck effect in nanomagnets

Abstract

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Keywords

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