Thermally induced spin-transfer torques in superconductor/ferromagnet bilayers

Thermally induced magnetization dynamics is currently a flourishing field of research due to its potential application in information technology. We study the paradigmatic system of a magnetic domain wall in a thermal gradient which is interacting with an adjacent superconductor. The spin-transfer t...

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Bibliographic Details
Published in:Physical review. B 2021-01, Vol.103 (2), p.L020503, Article L020503
Main Authors: Bobkova, I. V., Bobkov, A. M., Belzig, Wolfgang
Format: Article
Language:English
Subjects:
Domain walls
Ferromagnetism
Magnetic domains
Torque
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Summary:Thermally induced magnetization dynamics is currently a flourishing field of research due to its potential application in information technology. We study the paradigmatic system of a magnetic domain wall in a thermal gradient which is interacting with an adjacent superconductor. The spin-transfer torques arising in this system due to the combined action of the giant thermoelectric effect and the creation of equal-spin pairs in the superconductor are large enough to give rise to high domain wall velocities 103 times larger than previously predicted.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.103.L020503