FERROELECTRIC AND ANTI-FERROELECTRIC DYNAMICS OF PSEUDO-ONE-DIMENSIONAL CSD2PO4

被引：29

作者：

BLINC, R ^{[1
]}

SABARRETO, FC ^{[1
]}

机构：

[1] UNIV FED MINAS GERAIS, INST CIENCIAS EXACTAS, DEPT FIS, BELO HORIZONTE, MG, BRAZIL

来源：

JOURNAL OF CHEMICAL PHYSICS | 1980年 / 72卷 / 11期

关键词：

D O I：

10.1063/1.439058

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A simple model is proposed for the pseudo-one-dimensional (1d) ferroelectric and antiferroelectric phase transitions in CsD2PO 4 which is based on the behavior of spin 1/2 Ising chains in a longitudinal molecular field. The observed phase diagram can be reproduced if one assumes that the coupling constant beween unlike" chains changes its sign when the hydrostatic pressure exceeds a critical value. In addition to the usual "critical" slowing down of the order parameter fluctuations an "anisotropy" slowing down is predicted which may explain the fact that the soft modes in 1d CsH2PO4 and PbHPO4 are much slower than in 1d KH2PO4 and KD 2PO4. © 1980 American Institute of Physics."

引用

页码：6031 / 6034

页数：4

共 10 条

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[9] PRESSURE-INDUCED ANTI-FERROELECTRICITY IN FERROELECTRIC CSH2PO4 [J].

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