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A sequence of two ferrotoroidal phase transitions in nickel-bromine boracite Ni3B7O13Br

  • Condensed Matter
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Abstract

The phenomenological theory of a sequence of two second-order phase transitions in Ni-Br boracite is presented. Two different components of the toroidal moment vector T i are the order parameters of these transitions. Expressions are derived for the temperature dependences of the spontaneous values of T i , polarization P i , and magnetization M i and the dielectric χij=dP i /dE j , magnetic k ij =dM i /H j , and magnetoelectric α ij=dP i /dH j =dM j /dE i susceptibilities. Some of these susceptibilities display sharp temperature peaks in the vicinity of phase transitions.

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Authors and Affiliations

  1. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 117333, Russia

    D. G. Sannikov

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  1. D. G. Sannikov
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 73, No. 8, 2001, pp. 447–450.

Original Russian Text Copyright © 2001 by Sannikov.

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Sannikov, D.G. A sequence of two ferrotoroidal phase transitions in nickel-bromine boracite Ni3B7O13Br. Jetp Lett. 73, 401–403 (2001). https://doi.org/10.1134/1.1381636

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  • DOI: https://doi.org/10.1134/1.1381636

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