Probing the role of single defects on the thermodynamics of electric-field induced phase transitions

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Title: Probing the role of single defects on the thermodynamics of electric-field induced phase transitions
Authors: Kalinin, S. V.Jesse, S.Rodriguez, Brian al.
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Date: Apr-2008
Online since: 2013-12-19T09:56:05Z
Abstract: The kinetics and thermodynamics of first order transitions are universally controlled by defects that act as nucleation sites and pinning centers. Here we demonstrate that defect-domain interactions during polarization reversal processes in ferroelectric materials result in a pronounced fine structure in electromechanical hysteresis loops. Spatially resolved imaging of a single defect center in multiferroic BiFeO3 thin film is achieved, and the defect size and built-in field are determined self-consistently from the single-point spectroscopic measurements and spatially resolved images. This methodology is universal and can be applied to other reversible bias-induced transitions including electrochemical reactions.
Funding Details: Other funder
Funding Details: Division of Materials Sciences and Engineering and the Center for Nanophase Materials Sciences, Office of Basic Energy Sciences, U.S. Department of Energy, and by the Division of Materials Sciences and Engineering under Contract No. DE-AC02-05CH11231.
Type of material: Journal Article
Publisher: American Physical Society
Journal: Physical Review Letters
Volume: 100
Issue: 15
Start page: 155703
Copyright (published version): 2008 The American Physical Society
Keywords: Defect-domain interactionsPolarization reversal processesFerroelectric materialsElectromechanical hysteresis loops
DOI: 10.1103/PhysRevLett.100.155703
Language: en
Status of Item: Peer reviewed
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Appears in Collections:Physics Research Collection

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