Magnetization reversal in submicron disks: Exchange biased vortices

J. Sort, A. Hoffmann, S. H. Chung, K. S. Buchanan, M. Grimsditch, M. D. Baró, B. Dieny, J. Nogués

Research output: Contribution to journalArticlepeer-review


Submicron, circular, ferromagnetic-antiferromagnetic dots exhibit different magnetization reversal mechanisms depending on the direction of the magnetic applied field. Shifted, constricted hysteresis loops, typical for vortex formation, are observed for fields along the exchange bias direction. However, for fields applied close to perpendicular to the exchange bias direction, magnetization reversal occurs via coherent rotation. Magnetic force microscopy imaging together with micromagnetic simulations are used to further clarify the different magnetic switching behaviors.

Original languageEnglish (US)
Article number067201
JournalPhysical review letters
Issue number6
StatePublished - Aug 5 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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