Anelastic Characterization of Pb(Fe2/3W1/3)O3 Multiferroic Ceramics

被引：3
|
作者：
Fraygola, B. [1 ]
Garcia, D. [1 ]
Eiras, J. A. [1 ]
机构：
[1] Univ Fed Sao Carlos, Depto Fis, Grp Ceram Ferroeletr GCFerr, BR-13560 Sao Carlos, SP, Brazil
来源：
FERROELECTRICS | 2012年 / 428卷
基金：
巴西圣保罗研究基金会;
关键词：
PHASE-TRANSITIONS;
D O I：
10.1080/00150193.2012.675782
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Multiferroic relaxor ceramics Pb(Fe2/3W1/3)O-3 (PFW) has been synthesized by a modified B-site precursor method and characterized by anelastic measurements. Anomalies in the temperature dependence of the elastic constant have been observed at T-N and T-C, indicating that the establishment of ferroelectric and antiferromagnetic orders occurs via linear coupling with lattice strain. In both transitions, FE and AFM, the coupling with the elastic part of the system is linear-quadratic, ie F (S, M) = gSL(2) (L = M-2-M-1) and F (S, P) = beta SP2, justifying the presence of the term in eta(LP2)-P-2 free energy expansion.
引用
收藏
页码：87 / 93
页数：7
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