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首页> 外文期刊>Physica status solidi, B. Basic research >Influence of temperature on elastic properties of caesium cyanide
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Influence of temperature on elastic properties of caesium cyanide

机译:温度对氰化铯弹性的影响

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摘要

An extended three body force shell model (ETSM), which incorporates the effects of translational-rotational (TR) coupling, three body interactions (TBI) and anharmonicity, has been applied to investigate the temperature dependence of the second order elastic constants (c(ij), i, j = 1, 2) of CsCN. The elastic constant c.,, obtained by us shows an anomalous behaviour with the variation of temperature. The variations of elastic constants (c(11), c(12), c(44)) with temperature are almost in excellent agreement with Brillouin scattering measured data. We have also evaluated the temperature variations of the third order elastic constants (c(ijk)) and the pressure derivatives of the c(ij) in the CsCN material. However, their values could not be compared due to lack of experimental data. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinhem.
机译:扩展的三体力壳模型(ETSM)结合了平移-旋转(TR)耦合,三体相互作用(TBI)和非谐性的作用,已用于研究二阶弹性常数(c( ij),i,j = 1、2)。我们获得的弹性常数c。随温度变化显示出异常行为。弹性常数(c(11),c(12),c(44))随温度的变化几乎与布里渊散射测量数据非常吻合。我们还评估了CsCN材料中三阶弹性常数(c(ijk))的温度变化和c(ij)的压力导数。但是,由于缺乏实验数据,无法比较它们的值。 (C)2007 WILEY-VCH Verlag GmbH&Co. KGaA,Weinhem。

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