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The origin of frustration of magnetic coupling in the NiFeCrO4 ferrite

  • Magnetism and Ferroelectricity
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Abstract

The magnetostriction of the NiFeCrO4 ferrite is investigated for the first time. It is found that the frustration of magnetic coupling occurs only in the B sublattice of the NiFeCrO4 ferrite, whereas the A sublattice has a usual magnetic structure. The inference is made that the frustration of magnetic coupling in the B sublattice is caused not only by the negative direct BB exchange interaction Cr 3+B -Cr 3+B but also by the positive indirect AB exchange interaction Fe 3+A -O2−-Cr 3+B . Reasoning from the experimental data and an analysis of the exchange interactions in the NiFeCrO4 ferrite sample, it is demonstrated for the first time that the magnetic moments of Fe 3+A ions in this ferrite deviate from collinearity. It is established that, at low temperatures, the B sublattice of the NiFeCrO4 ferrite is responsible for the total magnetic moment n 0exp.

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Translated from Fizika Tverdogo Tela, Vol. 44, No. 4, 2002, pp. 720–723.

Original Russian Text Copyright © 2002 by Antoshina, Goryaga, Chursin.

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Antoshina, L.G., Goryaga, A.N. & Chursin, D.A. The origin of frustration of magnetic coupling in the NiFeCrO4 ferrite. Phys. Solid State 44, 747–751 (2002). https://doi.org/10.1134/1.1470570

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