Document Detail

Importance of the internal shape mode in magnetic vortex dynamics.
MedLine Citation:
PMID:  15525024     Owner:  NLM     Status:  PubMed-not-MEDLINE    
We investigate the motion of a nonplanar vortex in a circular easy-plane magnet with a rotating in-plane magnetic field. Our numerical simulations of the Landau-Lifshitz equations show that the vortex tends to a circular limit trajectory, with an orbit frequency which is lower than the driving field frequency. To describe this we develop a new collective variable theory by introducing additional variables which account for the internal degrees of freedom of the vortex core, strongly coupled to the translational motion. We derive the evolution equations for these collective variables and find limit-cycle solutions whose characteristics are in qualitative agreement with the simulations of the many-spin system.
Juan P Zagorodny; Yuri Gaididei; Denis D Sheka; Jean-Guy Caputo; Franz G Mertens
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Publication Detail:
Type:  Journal Article     Date:  2004-10-13
Journal Detail:
Title:  Physical review letters     Volume:  93     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2004 Oct 
Date Detail:
Created Date:  2004-11-04     Completed Date:  2004-12-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  167201     Citation Subset:  -    
Physics Institute, University of Bayreuth, 95440 Bayreuth, Germany.
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