Costa, L. V. [UNESP]Rocha, L. S. [UNESP]Cortés, J. A. [UNESP]Ramirez, M. A. [UNESP]Longo, E. [UNESP]Simões, A. Z. [UNESP]2018-12-112018-12-112015-01-01Ceramics International, v. 41, n. 8, p. 9265-9275, 2015.0272-8842http://hdl.handle.net/11449/177369Abstract Calcium (Ca)-doped bismuth ferrite (BiFeO<inf>3</inf>) thin films prepared by using the polymeric precursor method (PPM) were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), polarization and magnetic measurements. Structural studies by XRD and Rietveld refinement reveal the co-existence of distorted rhombohedral and tetragonal phases in the highest doped BiFeO<inf>3</inf> (BFO) where enhanced ferroelectric and magnetic properties are produced by internal strain. A high coercive field in the hysteresis loop is observed for the BiFeO<inf>3</inf> film. Fatigue and retention free characteristics are improved in the highest Ca-doped sample due to changes in the crystal structure of BFO for a primitive cubic perovskite lattice with four-fold symmetry and a large tetragonal distortion within the crystal domain.9265-9275engA. CeramicsA. Thin filmsB. Chemical SynthesisD. FerroelectricityArtigo10.1016/j.ceramint.2015.03.086Acesso aberto2-s2.0-849309261762-s2.0-84930926176.pdf