39K NMR-STUDY OF THE PARAELECTRIC-TO-INCOMMENSURATE PHASE-TRANSITION IN K2ZNCL4

被引：16

作者：

TOPIC, B ^{[1
]}

HAEBERLEN, U ^{[1
]}

BLINC, R ^{[1
]}

ZUMER, S ^{[1
]}

机构：

[1] EDVARD KARDELJ UNIV, J STEFAN INST, YU-61111 LJUBLJANA, YUGOSLAVIA

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.43.91

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The temperature dependence of the quadrupole-perturbed K-39 1/2 --> -1/2 NMR line shapes has been measured in the paraelectric (PE), incommensurate (I), and commensurate (C) phases of K2ZnCl4 between 600 and 390 K. In the PE phase and the high-temperature part of the I phase, fast chemical exchange of the 39K nuclei as well as a diffusive floating of the incommensurate modulation wave take place. In the low-temperature part of the I phase the modulation wave becomes solitonlike. The soliton density does not vanish as the I-C transition but persists well into the C phase.

引用

页码：91 / 97

页数：7

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