Relation between photoluminescence emission and local order-disorder in the CaTiO3 lattice modifier

In this letter, the authors propose that photoluminescence emission in CaTiO3 is affected not only by disorder in the lattice former but also by structural disorder in the lattice modifier. Structural disorder was evaluated by Ti, Ca K-edge x-ray absorption near-edge structure experiments and by pho...

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Bibliographic Details
Published in:	Applied physics letters Vol. 90; no. 11
Main Authors:	de Lazaro, Sergio, Milanez, Juliana, de Figueiredo, Alberthmeiry T., Longo, Valéria M., Mastelaro, Valmor R., De Vicente, Fabio S., Hernandes, Antônio C., Varela, José A., Longo, Elson
Format:	Journal Article
Language:	English
Published:	12-03-2007
Online Access:	Get full text
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Summary:	In this letter, the authors propose that photoluminescence emission in CaTiO3 is affected not only by disorder in the lattice former but also by structural disorder in the lattice modifier. Structural disorder was evaluated by Ti, Ca K-edge x-ray absorption near-edge structure experiments and by photoluminescence emission. The preedge feature of the Ca K edge was related to the intensity of photoluminescence emission. The results of the preedge feature of the Ca K-edge x-ray absorption near-edge structure confirm the presence of different Ca coordination numbers, namely, Ca–O11 and Ca–O12.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.2713359