Vogel-Fulcher freezing in relaxor ferroelectrics
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Jozef Stefan Institute, P.O. Box 3000, 1001 Ljubljana (Slovenia)
A physical mechanism for the freezing of polar nanoregions (PNRs) in relaxor ferroelectrics is presented. Assuming that the activation energy for the reorientation of a cluster of PNRs scales with the mean volume of the cluster, the characteristic relaxation time {tau} is found to diverge as the cluster volume reaches the percolation limit. Applying the mean field theory of continuum percolation, the familiar Vogel-Fulcher equation for the temperature dependence of {tau} is derived.
- OSTI ID:
- 20951563
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 76, Issue 2; Other Information: DOI: 10.1103/PhysRevB.76.020101; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nanoscopic Study of the Polarization-Strain Coupling in Relaxor Ferroelectric and the Search for New Relaxor Materials for Transducer and Optical Applications
Piezoelectric polar nanoregions and relaxation-coupled resonances in relaxor ferroelectrics
Compositional disorder, polar nanoregions and dipole dynamics in Pb(Mg1/3Nb2/3)O3-based relaxor ferroelectrics
Technical Report
·
Thu May 31 00:00:00 EDT 2007
·
OSTI ID:20951563
Piezoelectric polar nanoregions and relaxation-coupled resonances in relaxor ferroelectrics
Journal Article
·
Thu Oct 25 00:00:00 EDT 2018
· Physical Review B
·
OSTI ID:20951563
+1 more
Compositional disorder, polar nanoregions and dipole dynamics in Pb(Mg1/3Nb2/3)O3-based relaxor ferroelectrics
Journal Article
·
Sat Jan 01 00:00:00 EST 2011
· Zeitschrift fur Kristallographie
·
OSTI ID:20951563
+11 more