On the symmetry of a Preisach map

Details On the symmetry of a Preisach map On the symmetry of a Preisach map

2005-06-07

arxiv.org/abs/cond-mat/0506176v2

phys. stat. sol. (b) vol. 243(1), pp. 343-346, 2006

Physics

Condensed Matter

Materials Science

4 pages, 2 figures. Presented at the European Conference "Physics of Magnetism'05", Poznan (Poland), June 24-27, 2005. Accepte

Scientific paper

10.1002/pssb.200562453

At the very heart of the successful phenomenological model of magnetic hysteresis there is the so called Preisach distribution. In the existing literature it is implicitly assumed, that this distribution has a mirror symmetry. We show, by simple and convincing example, that this common assumption is plainly wrong. Dropping it, we gain the ability to model not only the usual hysteresis loops (major and minor) more accurately than ever before, but also those displaying the exchange bias effect, what is impossible within the framework of the symmetrical Preisach model. It is hoped, that our observation paves the way towards the unified description of all the hysteretic systems, including, but not necessarily limited to, superconductors, (multi)layered structures, nanocrystalline materials, patterned media, and - perhaps - the other non-magnetic hysteretic phenomena.

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