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Energy and magnetization transport in nonequilibrium macrospin systems
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik. Uppsala University, Sweden.
Vise andre og tillknytning
2015 (engelsk)Inngår i: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, E-ISSN 1550-2376, Vol. 92, nr 1, artikkel-id 012116Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2015. Vol. 92, nr 1, artikkel-id 012116
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-172491DOI: 10.1103/PhysRevE.92.012116ISI: 000357640900003Scopus ID: 2-s2.0-84937019748OAI: oai:DiVA.org:kth-172491DiVA, id: diva2:848623
Forskningsfinansiär
Swedish Research CouncilSwedish Energy AgencyKnut and Alice Wallenberg FoundationCarl Tryggers foundation Swedish e‐Science Research CenterSwedish Foundation for Strategic Research EU, FP7, Seventh Framework Programme, GA 323901
Merknad

QC 20150825

Tilgjengelig fra: 2015-08-25 Laget: 2015-08-25 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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