Abstract

A theory describing the contribution of Jahn-Teller (JT) ions of the iron group to the magnetoelastic properties of crystals has been developed. It is shown that at low temperatures the magnitude of the effect is determined by the dispersion of random low-symmetry fields in the system. A comparison is made of theoretical results with experimental data (for ferrites with Fe2+, Mn3+, Cu2+, Co2+ and Ni2+ ions) and their qualitative correspondence is demonstrated.

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