Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
Ferroelectricity in K2ZnI4
Fuminao Shimizu, Takayuki Anzai, Hiroshi Sekiguchi, Masaaki Takashige, Shozo Sawada
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Keywords: K2ZnI4, ferroelectricity, phase transition, Sr2GeS4-structure
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1994 Volume 63 Issue 2 Pages 437-440

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Abstract
Single crystals of K2ZnI4 with monoclinic Sr2GeS4 structure prepared by theBridgman method were investigated through DTA and dielectric measurements. Ferroelectric activity was found below 270, K, where the b-direction dielectric constant showed a sharp peak. The spontaneous polarization measured by the pyroelectric charge method was 0.32, μ C/cm2 at 100, K. The dielectric constant also showed a small stepwise anomaly around 190, K.
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© The Physical Society of Japan 1994
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