THE PRESSURE AND TEMPERATURE DEPENDENCES OF THE ELASTIC PROPERTIES OF EUS

被引：6

作者：

BENBATTOUCHE, N ^{[1
]}

SAUNDERS, GA ^{[1
]}

BACH, H ^{[1
]}

机构：

[1] RUHR UNIV BOCHUM,INST EXPTL PHYS 6,W-4630 BOCHUM 1,GERMANY

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1990年 / 51卷 / 02期

关键词：

Elastic constants; Grüneisen parameter; high pressure; higher order elasticity; magnetic semiconductors; ultrasonic wave propagation;

D O I：

10.1016/0022-3697(90)90091-S

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Velocities of ultrasonic waves propagated in monocrystalline EuS have been measured as a function of temperature and pressure. The elastic stiffness tensor components and their hydrostatic pressure dependences are used to establish the vibrational anharmonicity of the long wavelength acoustic modes. The pressure derivative ∂C11 ∂P is large, being dominated by nearest-neighbour repulsive forces. The pronounced anisotropy of the acoustic mode Grüneisen parameters is accounted for by the relative contributions from these nearest-neighbour repulsive forces. Anomalous decreases of the velocities of each ultrasonic mode are observed in the vicinity of the Curie temperature due to magnetic interactions. © 1990.

引用

页码：181 / 188

页数：8

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