A quantum-mechanical relaxation model

R. Skomski, A. Kashyap, D. J. Sellmyer

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The atomic origin of micromagnetic damping is investigated by developing and solving a quantum-mechanical relaxation model. A projection-operator technique is used to derive an analytical expression for the relaxation time as a function of the heat-bath and interaction parameters. The present findings are consistent with earlier research beyond the Landau-Lifshitz-Gilbert (LLG) equation and show that the underlying relaxation mechanism is very general. Zermelo's recurrence paradox means that there is no true irreversibility in non-interacting nanoparticles, but the corresponding recurrence times are very long and can be ignored in many cases.

Original languageEnglish (US)
Article number07D507
JournalJournal of Applied Physics
Volume111
Issue number7
DOIs
StatePublished - Apr 1 2012

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paradoxes
baths
relaxation time
damping
projection
operators
heat
nanoparticles
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

A quantum-mechanical relaxation model. / Skomski, R.; Kashyap, A.; Sellmyer, D. J.

In: Journal of Applied Physics, Vol. 111, No. 7, 07D507, 01.04.2012.

Research output: Contribution to journalArticle

Skomski, R. ; Kashyap, A. ; Sellmyer, D. J. / A quantum-mechanical relaxation model. In: Journal of Applied Physics. 2012 ; Vol. 111, No. 7.
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