PSEUDO ONE-DIMENSIONAL FERROELECTRIC ORDERING AND CRITICAL PROPERTIES OF CSH2PO4 AND CSD2PO4

被引:126
作者
BLINC, R [1 ]
ZEKS, B [1 ]
LEVSTIK, A [1 ]
FILIPIC, C [1 ]
SLAK, J [1 ]
BURGAR, M [1 ]
ZUPANCIC, I [1 ]
SHUVALOV, LA [1 ]
BARANOV, AI [1 ]
机构
[1] ACAD SCI USSR,INST CRYSTALLOG,MOSCOW V-71,USSR
关键词
D O I
10.1103/PhysRevLett.43.231
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The temperature dependence of the dielectric constant of CsH2PO4 shows a crossover between a region (3a K<~T-Tc<~90a K) dominated by one-dimensional correlations and a region (0a K<~T-Tc<~3a K) dominated by three-dimensional correlations. A similar effect is observed as well in CsD2PO4. The dielectric data allow for a quantitative determination of the ratio between the long-range interchain and the short-range intrachain coupling constants. P31 and H2 NMR data show that the ferroelectric transition is connected with an order of the H(2) hydrogens along the zig-zag chains. © 1979 The American Physical Society.
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收藏
页码:231 / 234
页数:4
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