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Structural study of the ferroelectric instability in SnPSe

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Abstract:

The structural change occurring in between the paraelectric and the ferroelectric phases is investigated by means of X-ray diffraction. Details of the structure in both phases are obtained and the role of the lone pair is discussed in the light of structural data. In agreement with the 2/ m to m symmetry lowering, polar displacements are found within the m plane away from a particular crystallographic direction but antiparallel displacements occur also. These results are discussed in the frame of the phenomenological theory which predicts a particular temperature dependence of the dielectric polarization in this crystal.

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Authors and Affiliations

  1. CEMES-CNRS (UP - CNRS 8011), B.P. 4347, 31055 Toulouse Cedex, France, , , , , , FR

    R. Enjalbert & J. Galy

  2. Department of Physics and Chemistry of Solid State, Uzhgorod State University, 294000 Uzhgorod Ukraine, , , , , , UA

    Y. Vysochanskii

  3. Université de Ouagadougou, FAST, Ouagadougou, Burkina, , , , , , BF

    A. Ouédraogo

  4. Université Toulon-Var, Bâtiment R, B.P. 132, 83957 La Garde Cedex, France, , , , , , FR

    P. Saint-Grégoire

Authors
  1. R. Enjalbert
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  2. J. Galy
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  3. Y. Vysochanskii
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  4. A. Ouédraogo
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  5. P. Saint-Grégoire
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Received: 10 July 1998

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Enjalbert, R., Galy, J., Vysochanskii, Y. et al. Structural study of the ferroelectric instability in SnPSe . Eur. Phys. J. B 8, 169–177 (1999). https://doi.org/10.1007/s100510050680

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  • DOI: https://doi.org/10.1007/s100510050680

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