Collective dynamics underpins Rayleigh behavior in disordered polycrystalline ferroelectrics

被引:113
作者
Bintachitt, P. [1 ,2 ]
Jesse, S. [3 ,4 ]
Damjanovic, D. [5 ]
Han, Y. [6 ]
Reaney, I. M. [6 ]
Trolier-McKinstry, S. [1 ,2 ]
Kalinin, S. V. [3 ,4 ]
机构
[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA
[4] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
[5] Swiss Fed Inst Technol Lausanne EPFL, Ceram Lab, CH-1015 Lausanne, Switzerland
[6] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England
基金
英国工程与自然科学研究理事会;
关键词
piezoelectric; ferroelectric; piezoelectric force microscopy; lead zirconate titanate; thin films; ZIRCONATE-TITANATE FILMS; 90-DEGREES DOMAIN-WALLS; THIN-FILMS; PIEZOELECTRIC PROPERTIES; CERAMICS; HYSTERESIS; RELAXATION; DEPENDENCE;
D O I
10.1073/pnas.0913172107
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Nanoscale and mesoscopic disorder and associated local hysteretic responses underpin the unique properties of spin and cluster glasses, phase-separated oxides, polycrystalline ferroelectrics, and ferromagnets alike. Despite the rich history of the field, the relationship between the statistical descriptors of hysteresis behavior such as Preisach density, and micro and nanostructure has remained elusive. By using polycrystalline ferroelectric capacitors as a model system, we now report quantitative nonlinearity measurements in 0.025-1 mu m(3) volumes, approximately 106 times smaller than previously possible. We discover that the onset of nonlinear behavior with thickness proceeds through formation and increase of areal density of micron-scale regions with large nonlinear response embedded in a more weakly nonlinear matrix. This observation indicates that large-scale collective domain wall dynamics, as opposed to motion of noninteracting walls, underpins Rayleigh behavior in disordered ferroelectrics. The measurements provide evidence for the existence and extent of the domain avalanches in ferroelectric materials, forcing us to rethink 100-year old paradigms.
引用
收藏
页码:7219 / 7224
页数:6
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