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Clusters in the model ferroelastic Hg2Cl2

  • Lattice Dynamics. Phase Transitions
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Abstract

The critical fluctuations induced by a ferroelastic phase transition and corresponding to the soft TA mode at the X point at Brillouin zone boundary have been studied in the model crystal Hg2Cl2 within a broad temperature and wave-vector range. Anisotropic diffuse x-ray scattering maxima associated with order-parameter fluctuations and nucleation of low-temperature orthorhombic clusters in the high-temperature tetragonal matrix have been found to exist at these points. New information has been obtained on the temperature dependence of the susceptibility and correlation length, cluster shape and anisotropy, and the critical exponents.

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Authors and Affiliations

  1. A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia

    Yu. F. Markov

  2. Universität des Saarlandes, Saarbrücken, Germany

    K. Knorr

Authors
  1. Yu. F. Markov
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  2. K. Knorr
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Fiz. Tverd. Tela (St. Petersburg) 41, 148–152 (January 1999)

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Markov, Y.F., Knorr, K. Clusters in the model ferroelastic Hg2Cl2 . Phys. Solid State 41, 132–136 (1999). https://doi.org/10.1134/1.1130743

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  • DOI: https://doi.org/10.1134/1.1130743

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