CRITICAL SLOWING-DOWN AND STATIC DIELECTRIC CONSTANT OF MONOCLINIC RbD2PO4.

Article abstract of DOI:10.1143/JPSJ.54.4359

The real and imaginary parts of the complex dielectric constant along the b axis of monoclinic RbD//2PO//4 were measured in a frequency range between 10**6 Hz and 10**9 Hz. It was found that RbD//2PO//4 shows dielectric critical slowing-down near the ferrielectric phase transition point. In addition, the static dielectric constants ( epsilon //0) of RbD//2PO//4 and the partially deuterated crystal Rb(D//0//. //3H//0//. //7)//2PO//4 were also measured at 10**4 Hz. A theoretical expression of epsilon //0 for a ferrielectric phase transition was obtained on the basis of the quasi-one-dimensional Ising model with assumed two sublattices. The remarkable deviations of epsilon //0 from the Curie-Weiss law observed in these crystals were analyzed successfully by the present theoretical result and the experimental results were discussed.

Full text of DOI:10.1143/JPSJ.54.4359

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J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17

J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17

J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17

J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17

J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17

J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17

J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17

J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17

J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17

J. Phys. Soc. Jpn. Downloaded from journals.jps.jp by University of Colorado on 04/25/17