Magnetic characteristics of three-dimensional impurity clusters in paramagnetic garnets

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

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)432-434
Number of pages3
JournalTheoretical and Experimental Chemistry
Issue number4
StatePublished - 1 Jul 1988
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (all)


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