| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1485729 | Journal of Non-Crystalline Solids | 2006 | 5 Pages |
Abstract
High pressure photoluminescence has been used for analysis of lattice disorder in La2.7Lu2.29Cr0.01Ga3O12 and La2.32Lu2.59Cr0.02Ga3.07O12 crystals. Photoluminescence of samples before annealing and those annealed for 5 h in oxygen and hydrogen atmosphere at 923 K has been measured. The pressure dependence of Cr3+ luminescence has been used to obtain the crystal field distribution (lattice disorder) and its dependence on the thermal treatment. The distribution energy of the 4T2 state has been considered as a measure of disorder. Annealing in oxygen has been found to reduce the energies of 4T2 states for all sites, and annealing in hydrogen – to increase these energies.
Keywords
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A. Kornylo, M. Grinberg, T. Łukasiewicz, M. Świrkowicz,