Long Range Order Theory of Ferromagnetic Superlattices with Application to FeCo and FeNi3
- 1 August 1966
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 5 (8)
- https://doi.org/10.1143/jjap.5.645
Abstract
A statistical theory of ferromagnetic superlattices is developed in the Bragg-Williams approximation with long range order for alloys of types AB and AB3with bcc and fcc lattices, respectively. Five parameters are introduced to describe the distribution of the two kinds of atoms with magnetic moments. These parameters are obtained as functions of temperature under the equilibrium condition, and the critical temperatures are determined in terms of the interaction energies. The general results thus developed are then applied to the analysis of experimental data so far available in FeCo and FeNi3. In the case of FeCo, where the interaction energies have not yet been measured, the agreement between the prediction of our theory and the experimental data is not satisfactory, but in the case of FeNi3, where the data for the interaction energies are available, the agreement is very satisfactory.Keywords
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