From mesoscopic to global polar order in the uniaxial relaxor ferroelectric Sr0.8Ba0.2Nb2O6

被引：19

作者：

Dec, J. ^{[1
]}

Kleemann, W. ^{[2
]}

Shvartsman, V. V. ^{[3
]}

Lupascu, D. C. ^{[3
]}

Lukasiewicz, T. ^{[4
]}

机构：

[1] Univ Silesia, Inst Mat Sci, PL-40007 Katowice, Poland

[2] Duisburg Essen Univ, D-47048 Duisburg, Germany

[3] Duisburg Essen Univ, Inst Mat Sci, D-45141 Essen, Germany

[4] Inst Elect Mat Technol, PL-01919 Warsaw, Poland

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 05期

关键词：

STRONTIUM-BARIUM NIOBATE; RANDOM-FIELD; SINGLE-CRYSTALS; DOMAIN STATES; ISING SYSTEMS; PBMG1/3NB2/3O3; TRANSITION; MODEL; DYNAMICS; GROWTH;

D O I：

10.1063/1.3680599

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In the relaxor ferroelectric Sr0.8Ba0.2Nb2O6 (SBN80) the relaxation of polar nanoregions (PNRs) reveals an anisotropic breathing mode when approaching the transition temperature, T-C approximate to 289 K, on cooling. Two distinct dispersion steps and peaks, respectively, of the complex susceptibility components in the milli- and megahertz frequency range reflect their large length-to-width aspect ratio. Below T-C power-law frequency dispersion characterizes the creep motion of the emerging ferroelectric domain walls and the fractal dimension D approximate to 2 of their contour lines. Piezoforce micrographs reveal nanometric jagged domains in accordance with the large disorder and random field magnitude in the extreme relaxor SBN80. (C) 2012 American Institute of Physics. [doi:10.1063/1.3680599]

引用

页数：4

共 28 条

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