Relaxor properties of SBN:CE
- 1 January 2000
- journal article
- modulated structures
- Published by Taylor & Francis in Ferroelectrics
- Vol. 240 (1), 1547-1554
- https://doi.org/10.1080/00150190008227981
Abstract
Relaxor properties of Sr0.61-xBa0.39Nb2O6:Cex 3+ (SBN61:Ce) are examined by dielectric spectroscopy, linear birefringence (LB) and optical second harmonic generation (SHG) as a function of frequency and temperature before and after poling. Relaxor behavior with large polydispersivity is observed above the ferroelectric phase transition temperature Tc . Below Tc a long-range ordered ferroelectric state with low polydispersivity prevails. An Ornstein-Zenike analysis of LB data suggests that pure SBN61 belongs to the 3D Ising universality class. Doping with Ce3+ ions, which seem to act as random fields, enhances the relaxor properties.Keywords
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