Email this article Electrical conductivity of CsCuCl3 crystals at structural phase transition
- Authors: Sorokin N.I.1
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Affiliations:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”
- Issue: Vol 62, No 4 (2017)
- Pages: 629-631
- Section: Physical Properties of Crystals
- URL: https://journals.rcsi.science/1063-7745/article/view/191216
- DOI: https://doi.org/10.1134/S1063774517040253
- ID: 191216
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Abstract
The electrical conductivity σ of CsCuCl3 single crystals synthesized by the crystallization method from aqueous solutions in the ternary CsCl–CuCl2–H2O system has been studied. The σ measurements for CsCuCl3 crystals have been carried out in the temperature range of 397–455 K, which covers the structural phase transition from the low-temperature (sp. gr. P6122, Z = 6) to the high-temperature (sp. gr. P63mc, Z = 2) modification at Ttr = 423 ± 8 K. A jump of σ by a factor of ~3 is observed on the σ(T) dependence in the region of the structural transition, which indicates the existence of first-order phase transition. The electric transfer activation enthalpies ΔHσ are found to be 1.0 ± 0.1 eV at T > Ttr and 0.8 ± 0.1 eV at T < Ttr. The σ value for CsCuCl3 crystals amounts to 7 × 10–6 S/cm at 455 K.
About the authors
N. I. Sorokin
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”
Author for correspondence.
Email: nsorokin1@yandex.ru
Russian Federation, Moscow, 119333
