Light-induced structural changes in Eu-doped (Pb,La)(Zr,Ti)O3 ceramics
Abstract
Fluorescence spectra of poled and unpoled Eu-doped (Pb,La)(Zr,Ti)O3 ceramics with various compositions were measured using 580 nm excitation. The ratio of the intensities of the Eu3+ D50→F72/D50→F71 fluorescence transitions was used as an indicator for the symmetry of the Eu3+ site. As the symmetry decreases, the ratio increases. Increasing the Zr content in (Pb,La)(Zr,Ti)O3 increases the ratio, indicating that the symmetry of the Eu3+ site decreases. Exposure of the Eu-doped (Pb,La)(Zr,Ti)O3 samples to UV light also increases the intensity ratio, indicating that UV light exposure leads to structural distortions in Eu-doped (Pb,La)(Zr,Ti)O3 samples, lowering the Eu3+ site symmetry.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 25, 2011
- Source ID
- 10.1063/1.3584136
Entities
People
- Hergen Eilers
- Ray Gunawidjaja
- Thandar Myint
Organizations
- Office of Naval Research
- Washington State University