Nucleation and annihilation of magnetic vortices in Pacman-like nanodots observed by micro-Hall probes

Author

Precner, M. ; Gregusova, D. ; Soltys, J. ; Fedor, J. ; Gucmann, F. ; Tobik, J. ; Kudela, R. ; Cambel, V.

Author_Institution

Inst. of Electr. Eng., Bratislava, Slovakia

fYear

2012

fDate

11-15 Nov. 2012

Firstpage

87

Lastpage

90

Abstract

We have used micro-Hall probe for the study of vortex dynamics in micromagnetic objects with lowered symmetry. The Pacman-like nanodot of the diameter of 1 μm was placed directly on the Hall probe and the signal was red in band resistance configuration. We show that the vortex nucleation and annihilation, as well as s-and c-state creation/annihilation are clearly visible on the magnetization reversal characteristics at 77 K. The experimental characteristics is in good agreement with the one calculated by micromagnetic simulations.

Keywords

magnetisation reversal; micromagnetics; nanomagnetics; nanostructured materials; nucleation; vortices; Pacman-like nanodots; c-state creation-annihilation; low symmetry; magnetic vortices; magnetization reversal characteristics; microHall probes; micromagnetic objects; micromagnetic simulation; red-band resistance configuration; s-state creation-annihilation; size 1 mum; temperature 77 K; vortex annihilation; vortex dynamics; vortex nucleation; Magnetic field measurement; Magnetization; Magnetization reversal; Micromagnetics; Probes; Temperature measurement; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Semiconductor Devices & Microsystems (ASDAM), 2012 Ninth International Conference on

Conference_Location

Smolenice

Print_ISBN

978-1-4673-1197-7

Type

conf

DOI

10.1109/ASDAM.2012.6418227

Filename

6418227