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Moscow University Physics Bulletin

, Volume 72, Issue 6, pp 569–573 | Cite as

A Phenomenological Model of Structural Phase Transitions in RbDy(Wo4)2

  • S. V. Pavlov
Condensed Matter Physics
  • 9 Downloads

Abstract

A phenomenological model of structural phase transitions in double rubidium–dysprosium tungstate is proposed. The model is constructed by equivariant catastrophe theory methods. The temperature dependence of the heat capacity near the phase transitions at temperatures T1 = 9 K and T2 = 4.9 K was calculated. Comparison with the experimental data shows a satisfactory qualitative agreement. In terms of the proposed model, the low-temperature phase transition can be interpreted as isomorphic.

Keywords

double rubidium–dysprosium tungstate phase transitions phenomenological model catastrophe theory equivariant vector fields 

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© Allerton Press, Inc. 2017

Authors and Affiliations

  1. 1.Department of PhysicsMoscow State UniversityMoscowRussia

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