Volume 73, Number 1, January 2006
|Page(s)||104 - 109|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||30 November 2005|
Topological defects, pattern evolution, and hysteresis in thin magnetic films
Department of Physics, Moscow State University - 119992 Moscow, Russia
2 Institute for Molecules and Materials, Radboud University Nijmegen 6525 ED Nijmegen, The Netherlands
Accepted: 4 November 2005
The nature of the magnetic hysteresis for thin films is studied by the Monte Carlo simulations. It is shown that a reconstruction of the magnetization pattern with external field occurs via the creation of vortex-antivortex pairs of a special kind at the boundaries of stripe domains. It is demonstrated that the symmetry of the order parameter is of primary importance for this problem, in particular, the in-plane magnetic anisotropy is necessary for the hysteresis.
PACS: 75.60.Ch – Domain walls and domain structure / 75.60.Ej – Magnetization curves, hysteresis, Barkhausen and related effects / 75.70.Ak – Magnetic properties of monolayers and thin films
© EDP Sciences, 2005
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