Journal
PHYSICAL REVIEW B
Volume 81, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.064107
Keywords
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Funding
- ORNL LDRD
- CNMS [CNMS2007-085]
- DMSE U. S. DOE Basic Energy Sciences
- ONR [N00014-06-1-0166]
- UCD
- Ministry of Science and Education of Ukraine [UU30/004]
- National Science Foundation [DMR-0908718]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [908718] Funding Source: National Science Foundation
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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.
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