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

Theory of Condensed Matter

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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	5
Journal	Journal of Physics Condensed Matter
Volume	34
Issue number	8
DOIs	https://doi.org/10.1088/1361-648X/ac3b26
Publication status	Published - 23-Feb-2022

Keywords

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

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10.1088/1361-648X/ac3b26Licence: CC BY

Seebeck effect in nanomagnetsFinal publisher's version, 960 KBLicence: CC BY

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

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

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AU - Fedorov, Dmitry V.

AU - Gradhand, Martin

AU - Tauber, Katarina

AU - Bauer, Gerrit E.W.

AU - Mertig, Ingrid

PY - 2022/2/23

Y1 - 2022/2/23

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 - Boltzmann equation

KW - DFT

KW - Seebeck effect

KW - semiclassical transport

KW - spin-dependent transport

KW - spin-orbit coupling

KW - transverse transport

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U2 - 10.1088/1361-648X/ac3b26

DO - 10.1088/1361-648X/ac3b26

M3 - Article

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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

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Keywords

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