Phase diagram and dielectric properties of mixed Cs1-x(NH4)xH2PO4 crystals
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Date
2002
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Abstract
Influence of NH4 M Cs substitution has been studied in the mixed Cs 1 m x (NH 4 ) x H 2 PO 4 crystals system by means of dielectric measurements. The x-T phase diagram was determined: for ammonium concentrations up to 0.1 the system has a monoclinic paraelectric phase with a transition into a ferroelectric phase whose temperature increases with increasing ammonium concentration. For ammonium concentration 0.4 to 1.0 the system shows a tetragonal paraelectric phase and a transition into an antiferroelectric phase. No solid solutions with concentrations between 0.1 and 0.4 could be grown. The system was further studied with the quasi-one-dimensional Ising model and the three-dimensional anisotropic Ising model.
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A.I. Baranov, V.V. Dolbinina, S. Lanceros-Mendez, and V.H. Schmidt, “Phase diagram and dielectric properties of mixed Cs1-x(NH4)xH2PO4 crystals,” Ferroelectrics 272, 225-230 (2002). doi: 10.1080/00150190211553.