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Dipolar random field Ising model: an application to garnet films | | Alessandro Magni Gabor Vertesy
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6 Jul 1999 | | Subject: | Disordered Systems and Neural Networks; Materials Science | cond-mat.dis-nn cond-mat.mtrl-sci | | Affiliation: | IEN Galileo Ferraris, INFM, Torino, Italy) Gabor Vertesy (Research Institute for Technical Physics and Materials Science, Budapest, Hungary | | Abstract: | 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. | | Source: | arXiv, cond-mat/9907075 | | Services: | Forum | Review | PDF | Favorites | |
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