Hysteresis loops of magnetic thin films with perpendicular anisotropy

Details Hysteresis loops of magnetic thin films with perpendicular anisotropy Hysteresis loops of magnetic thin films with perpendicular anisotropy

2004-12-17

arxiv.org/abs/cond-mat/0412461v1

Physics

Condensed Matter

Materials Science

8 pages, 8 figures

Scientific paper

10.1103/PhysRevB.72.094406

We model the magnetization of quasi two-dimensional systems with easy perpendicular (z-)axis anisotropy upon change of external magnetic field along z. The model is derived from the Landau-Lifshitz-Gilbert equation for magnetization evolution, written in closed form in terms of the z component of the magnetization only. The model includes--in addition to the external field--magnetic exchange, dipolar interactions and structural disorder. The phase diagram in the disorder/interaction strength plane is presented, and the different qualitative regimes are analyzed. The results compare very well with observed experimental hysteresis loops and spatial magnetization patterns, as for instance for the case of Co-Pt multilayers.

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