Tricritical Lifshitz point in the temperature-pressure-composition diagram for (PbySn_(1-y))_2P_2(SexS_(1-x))6 ferroelectrics

O. Andersson; O. Chobal; I. RizakV. Rizak

首页> 外文期刊>Physical review, B. Condensed matter and materials physics >Tricritical Lifshitz point in the temperature-pressure-composition diagram for (PbySn_(1-y))_2P_2(SexS_(1-x))6 ferroelectrics

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Tricritical Lifshitz point in the temperature-pressure-composition diagram for (PbySn_(1-y))_2P_2(SexS_(1-x))6 ferroelectrics

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The heat capacity of Sn_2P_2S_6 ferroelectric crystals has been measured under quasihydrostatic pressures up to 0.7 GPa. The analysis of the heat-capacity and literature data for the birefringence shows that the tricritical point of Sn_2P_2S_6 is in the 0.20–0.25 GPa range. Moreover, in the approximation of a linear change in thefree-energy expansion coefficients, with respect to concentration and pressure, thermodynamic trajectories have been constructed for (PbySn_(1-y))_2P_2(SexS_(1-x))6 solid solutions. We have thereby identified the region of the T-p-y-x diagram for (PbySn_(1-y))_2P_2(SexS_(1-x))_6 showing the tricritical Lifshitz point.

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《Physical review, B. Condensed matter and materials physics》 |2009年第17期|174107:1-174107:5|共5页
作者
O. Andersson; O. Chobal; I. RizakV. Rizak;
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作者单位

Department of Physics, Umesa University, S-901 87 Umea, Sweden;

Department of Solid State Electronics, Uzhhorod National University, 88000 Uzhhorod, Ukraine;

Department of Integrated Technologies of Aviation Manufacture, National Aerospace University of “KhAI,” 61000 Kharkov, Ukraine;

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正文语种英语
中图分类物理学;
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Lifshitz point; temperature-pressure-composition diagram; pressures;

Tricritical Lifshitz point in the temperature-pressure-composition diagram for (PbySn_(1-y))_2P_2(SexS_(1-x))6 ferroelectrics

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