Otro
Relation between photoluminescence emission and local order-disorder in the CaTiO3 lattice modifier
Registro en:
Applied Physics Letters. Melville: Amer Inst Physics, v. 90, n. 11, 3 p., 2007.
0003-6951
10.1063/1.2713359
WOS:000244959200027
WOS000244959200027.pdf
Autor
de Lazaro, Sergio
Milanez, Juliana
de Figueiredo, Alberthmeiry T.
Longo, Valeria M.
Mastelaro, Valmor R.
De Vicente, Fabio S.
Hernandes, Antonio C.
Varela, José Arana
Longo, Elson
Resumen
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-O-11 and Ca-O-12. (c) 2007 American Institute of Physics.