Santos, I. A.Guerra, J. de Los S. [UNESP]Araujo, E. B. [UNESP]Mendes, R. G.Eiras, J. A.2014-05-202014-05-202008-04-02Journal of Physics-condensed Matter. Bristol: Iop Publishing Ltd, v. 20, n. 13, p. 4, 2008.0953-8984http://hdl.handle.net/11449/10092The AC electric field and temperature dependences of the dielectric permittivity for strontium barium niobate (Sr(0.75)Ba(0.25)Nb(2)O(6)) relaxor ferroelectric thin films have been investigated. The results indicate the existence of a true mesoscopic structure evidenced by the nonlinear dielectric response of these films, which is similar to those observed for bulk relaxor ferroelectrics. A tendency for a temperature dependent crossover from a linear to a quadratic behaviour of the dielectric nonlinearity was observed, indicating an evolution from paraelectric to glass-like behaviour on cooling the samples towards the freezing temperature transition.4engArtigo10.1088/0953-8984/20/13/135209WOS:000254174900015Acesso restrito6725982228402054