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Energy and magnetization transport in nonequilibrium macrospin systems
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics. Uppsala University, Sweden.
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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
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Nano Technology
URN: urn:nbn:se:kth:diva-172491DOI: 10.1103/PhysRevE.92.012116ISI: 000357640900003ScopusID: 2-s2.0-84937019748OAI: diva2:848623
Swedish Research CouncilSwedish Energy AgencyKnut and Alice Wallenberg FoundationCarl Tryggers foundation Swedish eā€Science Research CenterSwedish Foundation for Strategic Research EU, FP7, Seventh Framework Programme, GA 323901

QC 20150825

Available from: 2015-08-25 Created: 2015-08-25 Last updated: 2015-08-25Bibliographically approved

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Borlenghi, SimoneBergqvist, LarsDelin, Anna
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