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 journalArticleResearchpeer-review

57 Citations (Scopus)

Abstract

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. © 2005 The American Physical Society.
Original languageEnglish
Article number067201
JournalPhysical Review Letters
Volume95
DOIs
Publication statusPublished - 5 Aug 2005

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