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Energy and magnetization transport in nonequilibrium macrospin systems
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
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2015 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, E-ISSN 1550-2376, Vol. 92, no 1, 012116Article in journal (Refereed) Published
Abstract [en]

We investigate numerically the magnetization dynamics of an array of nanodisks interacting through the magnetodipolar coupling. In the presence of a temperature gradient, the chain reaches a nonequilibrium steady state where energy and magnetization currents propagate. This effect can be described as the flow of energy and particle currents in an off-equilibrium discrete nonlinear Schrodinger (DNLS) equation. This model makes transparent the transport properties of the system and allows for a precise definition of temperature and chemical potential for a precessing spin. The present study proposes a setup for the spin-Seebeck effect, and shows that its qualitative features can be captured by a general oscillator-chain model.

Place, publisher, year, edition, pages
2015. Vol. 92, no 1, 012116
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-259648DOI: 10.1103/PhysRevE.92.012116ISI: 000357640900003OAI: oai:DiVA.org:uu-259648DiVA: diva2:847575
Funder
Swedish Research CouncilKnut and Alice Wallenberg FoundationCarl Tryggers foundation Swedish eā€Science Research CenterSwedish Foundation for Strategic Research EU, FP7, Seventh Framework Programme, GA 323901Swedish Energy Agency
Available from: 2015-08-20 Created: 2015-08-10 Last updated: 2017-12-04Bibliographically approved

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Borlenghi, SimoneChico, JonathanDelin, AnnaFransson, Jonas

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