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Structural and thermodynamic properties of the cubic perovskite BiAlO3

机译:立方钙钛矿BiAlO3的结构和热力学性质

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The structural and elastic properties of the cubic perovskite-type BiAlO3 are studied using the pseudopotential plane wave method within the local density approximation. The calculated structural parameters are in good agreement with previous calculations. The elastic constants are calculated using the static finite strain technique. Thermal effects on some macroscopic properties of BiAlO3 are predicted using the quasi-harmonic Debye model, in which the lattice vibrations are taken in account. We have obtained successfully the variations of the lattice constant, volume expansion coefficient, heat capacities and Debye temperature with pressure and temperature in the ranges of 0-30GPa and 0-1000K.
机译:在局部密度近似范围内,使用拟势平面波方法研究了立方钙钛矿型BiAlO3的结构和弹性性能。计算得出的结构参数与以前的计算非常吻合。弹性常数是使用静态有限应变技术计算的。使用准谐波德拜模型预测了BiAlO3某些宏观性能的热效应,其中考虑了晶格振动。我们成功地获得了晶格常数,体积膨胀系数,热容量和德拜温度随压力和温度在0-30GPa和0-1000K范围内的变化。

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