MgCNi3超导体在静水压下的弹性性质

周波; 王汝菊; 张友林; 李凤英; 禹日成; 靳常青

doi:10.11858/gywlxb.2003.02.015

MgCNi3超导体在静水压下的弹性性质

doi: 10.11858/gywlxb.2003.02.015

中国科学院物理研究所，北京 100080

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通讯作者:
周波

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出版历程
- 收稿日期: 2002-08-21
- 修回日期: 2002-10-08
- 发布日期: 2003-06-05

Elastic Properties of MgCNi3 Superconductor under Hydrostatic Pressure

Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

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Corresponding author: ZHOU Bo

摘要

摘要: 在0.1 MPa到0.5 GPa压力范围内，采用脉冲回波重合法（Pulse-Echo Overlap Method）测量了MgCNi3超导体的横波及纵波声速，计算了体弹模量B、剪切模量G等弹性参数以及德拜温度、比热等热力学参数随压力的变化。常压下的D与cV的值分别为454.82 K和111.30 J/(molK)。对B-p曲线作线性拟合，得到体弹模量B0在零压附近的导数B0，由此建立了MgCNi3的状态方程。
- MgCNi3 /
- 超导体 /
- 弹性模量
Abstract: Using Pulse-Echo Overlap Method, the velocities of longitudinal and shear waves of Ceramic MgCNi3 superconductor were measured up to hydrostatic pressure of 0.5 GPa. The bulk modulus B, shear modulus G, Debye temperature and specific heat under pressure were calculated. The values of Debye temperature D and specific heat cV under ambient condition are 454.82 K and 111.30 J/(molK), respectively. The B-p curve was fitted linearly to obtain B0, the first order derivative of bulk modulus at zero pressure. The Murnaghan equation of state was established.
- MgCNi3 /
- superconductor /
- elastic modulus

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参考文献(14)

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