Anomalies of dielectric, elastic and electromechanical properties of K0.25(NH4)0.75H2PO4 single crystal in the vicinity of antiferroelectric phase transition

被引：2

作者：

Korotkov, L. N. ^{[1
]}

Likhovaya, D. V. ^{[1
]}

Levitskii, R. R. ^{[2
]}

Sorokov, S. I. ^{[2
]}

Vdovych, A. S. ^{[2
]}

机构：

[1] Voronezh State Tech Univ, Voronezh, Russia

[2] Inst Condensed Matter Phys, Lvov, Ukraine

来源：

SOLID STATE COMMUNICATIONS | 2013年 / 160卷

基金：

俄罗斯基础研究基金会;

关键词：

H-bonded antiferroelectric; Antiferroelectric phase transition; Dielectric; piezoelectric and elastic anomalies; Phase transition; MIXED-CRYSTALS; PROTON GLASS; K1-X(NH4)XH2PO4; NH4H2PO4; RELAXOR;

D O I：

10.1016/j.ssc.2013.02.010

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dielectric permittivities (epsilon(11) and epsilon(33)), elastic compliance (S-66) and piezoelectric constant (d(36)) for the K-0.25( NH4)(0.75)H2PO4 single crystal were studied near antiferroelectric phase transition temperature (T-N). It was found that diffused maximums in both the epsilon(11)(T) and the epsilon(33)(T) dependences as well as in the d(36)(T) dependences are observed above T-N, while narrowed peak in S-66(T) curve is located below T-N. Analysis of experimental results speaks in favor of two-stage AFE -> PE phase transition in the crystal under study. Below T-N the drastic decreasing of electromechanical coupling factor (k(36)) is found. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：52 / 55

页数：4

共 33 条

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