Dresden 2009 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 12: Poster II
DF 12.5: Poster
Mittwoch, 25. März 2009, 09:30–12:30, P5
Dielectric and magnetic properties of CuIn1−xCrxP2S6 single crystals — •Vladimir Shvartsman1, Pavel Borisov1, Yulian Vysochanskii2, and Wolfgang Kleemann1 — 1Angewandte Physik, Universität Duisburg-Essen, Lotharstr. 1, 47048 Duisburg, Germany — 2Institute of Solid State Physics and Chemistry of Uzhgorod University, Ukraine
A variety of electric dipolar arrangements have been recently found in the layered thiophosphate compounds AIBIIIP2S6 (AI and BIII are mono- and trivalent metal ions). In particular, CuInP2S6 is in a ferrielectric state below 310 K, while CuCrP2S6 is antiferroelectric below 150 K. The latter compound undergoes also a transition into an antiferromagnetic state at 30 K. We report on investigations of magnetic and dielectric properties of solid solutions between these two compounds, CuIn1−xCrxP2S6 (x = 0.2 - 0.6). Temperature and frequency dependencies of the dielectric permittivity were measured. The distribution of relaxation times has been evaluated from the dielectric spectra. A transition into dipolar glassy state has been revealed below 50 K. The magnetic behavior of these compounds and a possible magnetoelectric coupling are discussed.