Dipolar random field Ising model: an application to garnet films

Details Dipolar random field Ising model: an application to garnet films Dipolar random field Ising model: an application to garnet films

1999-07-06

arxiv.org/abs/cond-mat/9907075v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

HTML paper, GIF images. To appear on Phys.Rev.B (Brief Reports). Application of the model published on Phys.Rev.B 59 (1999) 98

Scientific paper

10.1103/PhysRevB.61.3203

The dipolar-random field Ising model (DRFIM) recently introduced displays a behaviour that can be connected to the magnetization of bidimensional magnetic media. Epitaxial magnetic garnet films seem to be the ideal test material for such a model. In this work the results of the measurements performed on garnet samples are presented, as well as the comparisons with simulation results obtained by the DRFIM. The results prove that a variety of hysteresis loops are well described by the DRFIM. This capability does not derive from the fine tuning of a great number of parameters, but by the interplay of exchange and dipolar interactions.

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