Ultrasonic Studies Near Structural Phase Transitions
Ultrasonic Studies Near Structural Phase Transitions
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近结构相变的超声研究
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
W. Rehwald
中科院分区：
文献类型：
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作者：
B. Lüthi;W. Rehwald
在这一章中，我们讨论结构相变附近固体的弹性性质。它将表明，通过测量的弹性响应的重要信息，在该领域的相变可以获得。例如，弹性常数测量是一种非常敏感的工具，可以用来定位相变点，确定相图，在有利的情况下，还可以用来说明相变的顺序。此外，从弹性响应函数的温度变化可以推断应变和序参量之间的耦合类型。基于它的知识，可以导出耦合参数和其他重要量的特性变化。此外，弹性测量被用来测试现代重整化理论的各个方面，如交叉和维度效应。
In this chapter we discuss elastic properties of solids near structural phase transitions. It will be shown that by the measurement of the elastic response important information in the field of phase transitions can be obtained. For example, elastic constant measurements are a very sensitive tool to locate transition points, to determine phase diagrams, and, in favorable cases, to make statements about the order of the phase transition. Furthermore, from the temperature variation of the elastic response functions the type of coupling between strain and order parameter can be deduced. Based on its knowledge, the coupling parameters and the characteristic variations of other important quantitities can be derived. In addition, elastic measurements are used to test aspects of the modern renormalization theories, such as crossover and dimensional effects.