Hysteresis loops of Co-Pt perpendicular magnetic multilayers

Details Hysteresis loops of Co-Pt perpendicular magnetic multilayers Hysteresis loops of Co-Pt perpendicular magnetic multilayers

2003-07-21

arxiv.org/abs/cond-mat/0307507v1

Physics

Condensed Matter

4.5 pages, 5 figures

Scientific paper

10.1088/0953-8984/16/32/022

We develop a phenomenological model to study magnetic hysteresis in two samples designed as possible perpendicular recording media. A stochastic cellular automata model captures cooperative behavior in the nucleation of magnetic domains. We show how this simple model turns broad hysteresis loops into loops with sharp drops like those observed in these samples, and explains their unusual features. We also present, and experimentally verify, predictions of this model, and suggest how insights from this model may apply more generally.

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