Dielectric non-Debye domain wall response and aging of SBN:Ce

被引：4

作者：

Kleemann, W ^{[1
]}

Dec, J

Pankrath, R

机构：

[1] Gerhard Mercator Univ, Lab Angew Phys, D-47048 Duisburg, Germany

[2] Univ Osnabruck, Fachbereich Phys, D-46069 Osnabruck, Germany

来源：

FERROELECTRICS | 2003年 / 291卷

关键词：

relaxor; domain wall; relaxation; creep; susceptibility;

D O I：

10.1080/00150190390222565

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Different non-Debye dielectric spectra are observed in different low-frequency regimes in a polydomain relaxor ferroelectric single crystal, Sr-0.603 Ce-0.007 Ba-0.39 Nb2O6 ( SBN :Ce), in the vicinity of its transition temperature, T-c approximate to 320 K. At f < 10 Hz the response is due to irreversible creeplike wall motion, chi' proportional to chi'' proportional to omega -beta with beta approximate to 0.2, while polydispersive reversible wall segment relaxation with pink noise character [Joffe and Vinokur, 1987] is encountered at larger frequencies, f > 10 Hz. The crossover between both kinds of dielectric response is attributed to a dynamical phase transition [Nattermann et al. 2001]. While nearly ideal creep is observed in as-cooled samples, deviations towards reversible very-low frequency relaxation are revealed after aging.

引用

页码：75 / 82

页数：8

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