Study of the physical properties of BiFeO3 films obtained by RF sputtering using a homemade target J.C. Leal-Zayas; R.A. Vargas-Ortiz; J.L. Almaral-Sánchez; J.M. Mendivil-Escalante; R. Silva-González; K.M. Moya-Canul; J.I. Peña-Flores; J.M. Yáñez-Limón;