title: Manipulation of magnetic vortex parameters in disk-on-disk nanostructures with various geometry.
abstract: Magnetic nanostructures in the form of a sandwich consisting of two permalloy (Py) disks with diameters of 600 and 200 nm separated by a nonmagnetic interlayer are studied. Magnetization reversal of the disk-on-disk nanostructures depends on the distance between centers of the small and big disks and on orientation of an external magnetic field applied during measurements. It is found that manipulation of the magnetic vortex chirality and the trajectory of the vortex core in the big disk is only possible in asymmetric nanostructures. Experimentally studied peculiarities of a motion path of the vortex core and vortex parameters by the magneto-optical Kerr effect (MOKE) magnetometer are supported by the magnetic force microscopy imaging and micromagnetic simulations.
authors.affiliation: Laboratory of Thin Film Technologies, School of Natural Sciences, Far Eastern Federal University, Vladivostok 690950, Russia.
authors.forename: Maxim E
authors.initials: ME
authors.lastname: Stebliy
authors.affiliation: Laboratory of Thin Film Technologies, School of Natural Sciences, Far Eastern Federal University, Vladivostok 690950, Russia.
authors.forename: Alexander G
authors.initials: AG
authors.lastname: Kolesnikov
authors.affiliation: Laboratory of Thin Film Technologies, School of Natural Sciences, Far Eastern Federal University, Vladivostok 690950, Russia.
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Ognev
authors.affiliation: Laboratory of Thin Film Technologies, School of Natural Sciences, Far Eastern Federal University, Vladivostok 690950, Russia.
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Samardak
authors.affiliation: Laboratory of Thin Film Technologies, School of Natural Sciences, Far Eastern Federal University, Vladivostok 690950, Russia.
authors.forename: Ludmila A
authors.initials: LA
authors.lastname: Chebotkevich
keywords: hysteresis; magnetic vortex; magnetization reversal; micromagnetic structure
references.citation: Phys Rev Lett. 2008 Dec 31;101(26):267206
references.pmid: 19437670