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Thermodynamic simulation of the kovar and invar behavior of ferromagnets

  • Theory of Metals
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Abstract

In terms of the theory of second-order phase transitions with allowance for the magnetophonon interaction of the magnetic subsystem with the crystal lattice of the ferromagnet, an approach has been developed which makes it possible to give a consistent thermodynamic description of the mechanism of formation of invar and kovar effects. It is shown that the invar and kovar behavior is observed for magnets with a definite relationship of the thermodynamic parameters that characterize the ferromagnetic phase. The thermodynamic consideration is illustrated by model calculations. Ways for an experimental verification of the thermodynamic conclusions of the theory are discussed.

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  1. Ural Plant of Precision Alloys, ul. Kol’tsevaya 5, Berezovskii, Sverdlovsk oblast, 623704, Russia

    V. Yu. Bodryakov

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Original Russian Text © V.Yu. Bodryakov, 2007, published in Fizika Metallov i Metallovedenie, 2007, Vol. 104, No. 1, pp. 22–31.

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Bodryakov, V.Y. Thermodynamic simulation of the kovar and invar behavior of ferromagnets. Phys. Metals Metallogr. 104, 19–28 (2007). https://doi.org/10.1134/S0031918X07070046

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  • DOI: https://doi.org/10.1134/S0031918X07070046

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