title: Magnetization reversal in submicron disks: exchange biased vortices.
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.
authors.affiliation: Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain. jordi.sort@uab.es
authors.forename: J
authors.initials: J
authors.lastname: Sort
authors.forename: A
authors.initials: A
authors.lastname: Hoffmann
authors.forename: S-H
authors.initials: SH
authors.lastname: Chung
authors.forename: K S
authors.initials: KS
authors.lastname: Buchanan
authors.forename: M
authors.initials: M
authors.lastname: Grimsditch
authors.forename: M D
authors.initials: MD
authors.lastname: Baró
authors.forename: B
authors.initials: B
authors.lastname: Dieny
authors.forename: J
authors.initials: J
authors.lastname: Nogués