Pontes, F. M.Leite, E. R.Longo, Elson [UNESP]Varela, José Arana [UNESP]Araujo, E. B.Eiras, J. A.2014-05-202014-05-202000-04-24Applied Physics Letters. Melville: Amer Inst Physics, v. 76, n. 17, p. 2433-2435, 2000.0003-6951http://hdl.handle.net/11449/32464The dielectric properties of (Ba, Sr)TiO3 films were found to be remarkably sensitive to the postannealing treatment atmosphere. This study demonstrates that postannealing in an oxygen atmosphere increases the dielectric relaxation phenomenon and that postannealing in a nitrogen atmosphere produces a slight dielectric relaxation. Such dependence of the dielectric relaxation was related both to oxygen vacancies and to the presence of negatively charged oxygen, trapped at the grain boundary and/or at the electrode/dielectric film interface. (C) 2000 American Institute of Physics. [S0003-6951(00)00817-2].2433-2435engArtigo10.1063/1.126367WOS:000086538700037Acesso abertoWOS000086538700037.pdf