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Determination of initial magnetization curve from crystallites size and effective anisotropy field

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3 Author(s)
Globus, A. ; Centre National de la Recherche Scientifique, Bellevue, France ; Duplex, Paul ; Guyot, Marcel

It is shown that in YIG the magnetization in low fields is due to the same mechanisms for the whole temperature range to the Curie point. At a given temperature the magnetization curves for different samples can be reduced to a single curve by taking into account the grain size. The interpretation is based on a model proposed earlier by Globus: the value of the reversible magnetization would be determined by the wall bulging, the value of the nonreversible magnetization by the wall displacement inside a spherical grain. For different temperatures a single reduced line is obtained by introducing the saturation magnetization and the effective anisotropy field, which is calculated from the susceptibility measured on a sample with single domain grains. So, it is possible to obtain a single magnetization curve which characterizes the composition.

Published in:

Magnetics, IEEE Transactions on  (Volume:7 ,  Issue: 3 )

Date of Publication:

Sep 1971

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