Dielectric properties of ferroelectric Rb2CdI4

Dielectric properties of ferroelectric Rb2CdI4 were investigated. Since it is well known that the crystal surface reacts chemically with silver paste electrode and it makes dielectric quantities unstable, we reexamined dielectric properties using the sample with evaporated gold electrode. As the res...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2000-12, Vol.69 (12), p.4055-4059
Main Authors: SHIMIZU, Fuminao, YAMAGUCHI, Toshihisa, TAKASHIGE, Masaaki
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Permittivity (dielectric function)
Physics
Pyroelectric and electrocaloric effects
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Summary:Dielectric properties of ferroelectric Rb2CdI4 were investigated. Since it is well known that the crystal surface reacts chemically with silver paste electrode and it makes dielectric quantities unstable, we reexamined dielectric properties using the sample with evaporated gold electrode. As the result, we obtained the stable results of the temperature dependence of the dielectric constant and pyroelectric charge. The experimental data established that ferroelectric Curie point of Rb2CdI4 is 211 K and the spontaneous polarization Ps is about 0.4 μC/cm2 around 4 K. The frequency dispersion of the dielectric constant was also observed below the Curie point but its origin is still open.
ISSN:0031-9015
1347-4073
DOI:10.1143/jpsj.69.4055