Local modification of the magnetic vortex-core velocity by gallium implantation

Journal Article · Fri Mar 14 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4868222· OSTI ID:22277884

Vogel, Andreas; Beyersdorff, Björn ^[1]; Weigand, Markus ^[2]; Frömter, Robert; Peter Oepen, Hans; Meier, Guido ^[1]

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1. Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstr. 11, 20355 Hamburg (Germany)
2. Max-Planck-Institut für Intelligente Systeme, Heisenbergstraße 3, 70596 Stuttgart (Germany)

The dynamics of magnetic vortices in microsquares with local modifications of magnetic parameters and thickness are investigated. By implanting gallium ions with focussed ion beam into permalloy thin-film elements, we have locally tailored their magnetic properties and the layer thickness. The vortex of the Landau domain pattern of a square is resonantly excited to a gyrotropic motion and crosses regions with and without implantation. With time-resolved scanning transmission x-ray microscopy, we observe an abrupt change in the vortex velocity close to the borders between the two regions.

• OSTI ID: 22277884
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DOMAIN STRUCTURE
GALLIUM
GALLIUM IONS
ION BEAMS
ION IMPLANTATION
MAGNETIC FLUX
MAGNETIC PROPERTIES
MICROSCOPY
MODIFICATIONS
PERMALLOY
THICKNESS
THIN FILMS
TIME RESOLUTION
VELOCITY
VORTICES
X RADIATION