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Raman Spectroscopic Investigation of the Ferroelectric Soft Mode in Pb5Ge3O11 under High Hydrostatic Pressure

  • T. Suski
  • W. Müller-Lierheim
  • W. Dultz
  • H. Krause
  • H. H. Otto
  • W. Gebhardt

Abstract

Lead germanate, Pb5Ge3O11, undergoes a uniaxial, almost second-order, phase transition at 450 K from the ferroelectric phase with the space group P3 to the paraelectric phase with the space group P6 [1–7]. The spontaneous polarization in the ferroelectric phase is parallel to [001]; there are only two (180°) domains which are enantiomorphous [8–10]. Pb5Ge3O11 is optically active in [001]-direction, and the handedness of the optical rotation can be reversed by the application of an external electric field [8], which reverses the domain orientation.

Keywords

Raman Spectrum Pressure Dependence Ferroelectric Phase Soft Mode Paraelectric Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • T. Suski
    • 1
  • W. Müller-Lierheim
    • 1
  • W. Dultz
    • 1
  • H. Krause
    • 1
  • H. H. Otto
    • 1
  • W. Gebhardt
    • 1
  1. 1.Universität RegensburgRegensburgW. Germany

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