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Magnetic characteristics of three-dimensional impurity clusters in paramagnetic garnets

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Abstract

A study has been made on the effects of biquadratic exchange interaction and distortions on the behavior of x−1(T), the reciprocal of the magnetic susceptibility, and the spin specific heat c(T) for impurity three-dimensional clusters. It is found that even biquadratic exchange small by comparison with the Heisenberg value (j/J0 = 0.05) produces considerable changes (up to 30%) in the magnitude and temperature dependence of x−1(T) in the region kT ≃ J0. An increase in the biquadratic exchange parameter j reduces the peak in c(T) and shifts it to lower temperatures. The specific course of X−1(T) at intermediate temperatures, kT ≃ J0, and of c(T) at low temperatures enables one to detect these clusters and to distinguish the contributions from impurity pairs and triplets, as well as to estimate the non-Heisenberg exchange interactions.

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Literature cited

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Authors and Affiliations

  1. Institute of Metallurgy, Urals Scientific Center, Academy of Sciences of the USSR, Sverdlovsk

    M. I. Belinskii, V. N. Kiselev, A. N. Men' & B. S. Tsukerblat

Authors
  1. M. I. Belinskii
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  2. V. N. Kiselev
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  3. A. N. Men'
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  4. B. S. Tsukerblat
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Additional information

Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 23, No. 4, pp. 462–464, July–August, 1987.

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Belinskii, M.I., Kiselev, V.N., Men', A.N. et al. Magnetic characteristics of three-dimensional impurity clusters in paramagnetic garnets. Theor Exp Chem 23, 432–434 (1988). https://doi.org/10.1007/BF00536362

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  • DOI: https://doi.org/10.1007/BF00536362

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