Dielectric Properties of Rb 2 CdBr 4 and Rb 2 HgBr 4 ∗

Author: SHIMIZU FUMINAO   TAKASHIGE MASAAKI  

Publisher: Taylor & Francis Ltd

ISSN: 0015-0193

Source: Ferroelectrics, Vol.300, Iss.1, 2004-01, pp. : 161-163

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Abstract

Phase transitional properties of Rb2CdBr4and Rb2HgBr4were investigated. The differential thermal analysis for Rb2CdBr4indicates the same supercooled nature of the phase transition as observed in A2BX4-type halides with the structure of Sr2GeS4-type. On the other hand, the temperature dependence of the dielectric constant of Rb2HgBr4shows two anomalies at low temperatures, which are analogous to those of Cs2HgBr4and Cs2ZnI4with the structure of orthorhombic-K2SO4-type.∗Paper originally presented at 10th European Meeting on Ferroelectricity, Cambridge, U.K., August 3–8, 2003.