Milanez, Julianade Figueiredo, Alberthmeiry T. [UNESP]de Lazaro, SergioLongo, Valeria M. [UNESP]Erlo, RafaelMastelaro, Valmor R.Franco, Roberto W. A.Longo, Elson [UNESP]Varela, José Arana [UNESP]2014-05-202014-05-202009-08-15Journal of Applied Physics. Melville: Amer Inst Physics, v. 106, n. 4, p. 7, 2009.0021-8979http://hdl.handle.net/11449/42378In this paper, electron paramagnetic resonance, photoluminescence (PL) emission, and quantum mechanical calculations were used to observe and understand the structural order-disorder of CaTiO3, paying special attention to the role of oxygen vacancy. The PL phenomenon at room temperature of CaTiO3 is directly influenced by the presence of oxygen vacancies that yield structural order-disorder. These oxygen vacancies bonded at Ti and/or Ca induce new electronic states inside the band gap. Ordered and disordered CaTiO3 was obtained by the polymeric precursor method. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3190524]7engArtigo10.1063/1.3190524WOS:000270083800041Acesso restritoWOS000270083800041.pdf