Study of ferroelectric-paraelectric phase transition of RbH2AsO4 single crystals by 87Rb NMR relaxation time measurements

被引：1
|
作者：
Lim, Ae Ran [1 ]
Kim, Changsoo [2 ]
Lee, SangGap [2 ]
Lee, Kwang-Sei [3 ]
机构：
[1] Jeonju Univ, Dept Sci Educ, Jeonju 560759, South Korea
[2] Korea Basic Sci Inst, Div Mat Sci, Taejon 305806, South Korea
[3] Inje Univ, Ctr Nano Mfg, Dept Nano Syst Engn, Gimhae 621749, South Korea
来源：
SOLID STATE COMMUNICATIONS | 2014年 / 178卷
基金：
新加坡国家研究基金会;
关键词：
Single crystal; Structural geometry; Ferroelectric; Nuclear magnetic resonance; TEMPERATURE; KH2PO4-TYPE; PHOSPHATES; ARSENATES; RESONANCE;
D O I：
10.1016/j.ssc.2013.10.014
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The temperature dependences of the resonance frequency, line width, and spin lattice relaxation time T-1 of the ferroelectric and paraelectric phases of RbH2AsO4 crystals are investigated. The Rb-87 NMR line at the phase transition temperature T-C (=110 K) splits into two lines, which indicates the occurrence of phase transition from tetragonal to orthorhombic phase. In addition, T-1 for the Rb-87 nucleus undergoes remarkable changes near T-C, which indicates drastic alterations of the spin dynamics at T-C. At T-C, changes occur in the resonance frequency and T-1 which are related to variations in the symmetry of the environments of the Rb-87 ions. (C) 2013 Elsevier Ltd. All rights reserved.
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页码：7 / 10
页数：4
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