NEW RESULTS IN THE STUDY OF BRILLOUIN-SCATTERING IN THIOUREA

被引：16

作者：

AN, CX

BENOIT, JP

HAURET, G

CHAPELLE, JP

机构：

[1] Laboratoire de Physique Cristalline, (Equipe de Recherche associée au CNRS No. 13), Université de Paris-Sud

来源：

SOLID STATE COMMUNICATIONS | 1979年 / 31卷 / 08期

关键词：

D O I：

10.1016/0038-1098(79)90257-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Below T2 = 202 K, in the incommensurate phase, a Debye relaxation appears for c33; it can be attributed to a linear coupling between an acoustical mode and a phason. The relaxation time is τ = τ0/(T0-T) with τ0 = 6.2 x 10-12 sec deg and T0 = 200.9 K. The same phenomenon appears more weakly for c11. The c66 elastic constant has a double discontinuity around T1 = 169 K; this shows that in the vicinity of T1 there are two transitions, separated by a temperature interval of 3°. © 1979.

引用

页码：581 / 583

页数：3

共 7 条

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