Abstract
Equations for the magnetization in the second order with respect to the interaction, which take account of quadratic fluctuations of the molecular field, are derived.
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J. Smart, The Effective Field in Magnetism Theory [Russian translation], Mir, Moscow (1968).
S. V. Tyablikov, Methods of the Quantum Theory of Magnetism [in Russian], Nauka, Moscow (1975), Chap. VII and Supplement.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 101–105, December, 1977.
The author is grateful to Professor B. I. Kochelaev for his examination of the manuscript and discussion of the results of this research.
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Nigmatullin, R.R. Equations for magnetization in the generalized Hartree-Fock approximation (GHFA). II. Soviet Physics Journal 20, 1616–1619 (1977). https://doi.org/10.1007/BF00897435
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DOI: https://doi.org/10.1007/BF00897435