Two relaxators dielectric behaviour of ammonium hydrogen bis-chloroacetate near the ferroelectric phase transition

被引：9

作者：

Pawlaczyk, C

Jakubas, R

机构：

[1] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

[2] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland

来源：

SOLID STATE COMMUNICATIONS | 1999年 / 113卷 / 05期

关键词：

ferroelectrics; dielectric response; phase transitions;

D O I：

10.1016/S0038-1098(99)00490-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Dielectric response of the ammonium hydrogen bis-chloroacetate, NH4H(ClCH4COO)(2) (AHCA), in the frequency range from 100 Hz to 10 GHz has been studied. In the temperature range close to the phase transition a two-relaxator dielectric behaviour was found. The high frequency (similar to 1 GHz) relaxator has properties of ferroelectric relaxational soft mode. The low frequency (similar to 10-100 MHz) relaxator displays properties common to the domain dielectric contribution known for some other ferroelectrics. The coexistence of the two dielectric relaxators in the vicinity of the phase transition is discussed using a conception of the free and pinned order clusters. (C) 1999 Elsevier Science Ltd. All rights reserved.

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页码：251 / 255

页数：5

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