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arxiv cond-mat/9907075 v1 pith:RVUIVQH5 submitted 1999-07-06 cond-mat.dis-nn cond-mat.mtrl-sci

Dipolar random field Ising model: an application to garnet films

Alessandro Magni (IEN Galileo Ferraris , INFM , Torino , Italy) Gabor Vertesy (Research Institute for Technical Physics , Materials Science , Budapest , Hungary) This is my paper
classification cond-mat.dis-nn cond-mat.mtrl-sci
keywords drfimgarnetmodelresultsdipolarfieldfilmsising
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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