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Phase transitions in the (Cs1−x Rbx)2ZnI4 system

  • Lattice Dynamics. Phase Transitions
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Abstract

(Cs1−x Rbx)2ZnI4 crystals were grown by two different methods with Rb concentrations varying from x=0 to 2.5%. 127I NQR and calorimetric measurements showed that crystals grown by the Bridgman technique contain residual impurities (∼0.5%) for all x. While x=0 crystals grown from solution do not contain detectable impurities, they allow incorporation only of a low Rb concentration, not above 0.5%. A transition-temperature-concentration (x) phase diagram has been constructed for Bridgman-grown crystals from NQR data. Rb doping shifts the normal-incommensurate and incommensurate-ferroelastic phase-transition points toward higher temperatures with different rates. The P21/m↔P1 first-order transition shifts toward lower temperatures. The region of low Rb concentrations lies closest to the critical point.

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Authors and Affiliations

  1. A. V. Kirenskii Institute of Physics, Siberian Branch of the Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

    A. A. Sukhovskii, V. V. Lisin, I. P. Aleksandrova & V. N. Voronov

  2. Saragossa University, 50009, Saragossa, Spain

    J. J. Melero

Authors
  1. A. A. Sukhovskii
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  2. V. V. Lisin
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  3. I. P. Aleksandrova
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  4. V. N. Voronov
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  5. J. J. Melero
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Additional information

Fiz. Tverd. Tela (St. Petersburg) 41, 143–147 (January 1999)

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Sukhovskii, A.A., Lisin, V.V., Aleksandrova, I.P. et al. Phase transitions in the (Cs1−x Rbx)2ZnI4 system. Phys. Solid State 41, 128–131 (1999). https://doi.org/10.1134/1.1131082

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  • DOI: https://doi.org/10.1134/1.1131082

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