Direct evidence of mesoscopic dynamic heterogeneities at the surfaces of ergodic ferroelectric relaxors

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Title: Direct evidence of mesoscopic dynamic heterogeneities at the surfaces of ergodic ferroelectric relaxors
Authors: Kalinin, S. V.
Rodriguez, Brian J.
Budai, J. D.
et al.
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Date: Feb-2010
Online since: 2013-12-13T10:19:34Z
Abstract: Spatial variability of polarization relaxation kinetics in the relaxor ferroelectric 0.9Pb(Mg1/3Nb2/3)O-3-0.1PbTiO(3) is studied using time-resolved piezoresponse force microscopy at room temperature. Both the statistical principal component and correlation function analysis and the stretched exponent fits of relaxation curves illustrate the presence of mesoscopic "fast"and "slow" 100-200 nm regions. The spatial distribution of activation energies is reconstructed using a neural-network-based inversion of the relaxation data. The results directly prove the presence of mesoscopic heterogeneities associated with static and dynamic components of the order parameter on the surfaces of ferroelectric relaxors in the ergodic phase.
Funding Details: Other funder
Type of material: Journal Article
Publisher: American Physical Society
Journal: Physical Reviewv B
Volume: 81
Issue: 6
Start page: 064107
Copyright (published version): 2010 The American Physical Society
Keywords: Polarization relaxation kineticsPiezoresponse force microscopyStatic heterogeneityDynamic heterogeneityPMN-10PT
DOI: 10.1103/PhysRevB.81.064107
Language: en
Status of Item: Peer reviewed
Appears in Collections:Physics Research Collection

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