Vortex magnetization reversal in double-layer ferromagnetic/ antiferromagnetic dots

K. Y. Guslienko, A. Hoffmann

Research output: Contribution to journalArticlepeer-review

Abstract

We investigated theoretically the magnetization reversal via vortex nucleation and annihilation in double-layer ferromagnetic/antiferromagnetic cylindrical dots. The influence of the antiferromagnetic layer on the magnetization reversal is accounted for by means of an interfacial, unidirectional exchange field. We consider explicitly a nonuniformity of the magnetization reversal mode along the direction perpendicular to the layers, which gives rise to a nonuniform Bloch line. The vortex annihilation fields, the vortex trajectory, and the average dot magnetization are calculated as functions of the dot geometrical parameters and the external field direction with respect to the exchange-bias field. The calculations are compared with recent experiments.

Original languageEnglish (US)
Article number093901
JournalJournal of Applied Physics
Volume101
Issue number9
DOIs
StatePublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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