Microstructure, magnetic and electric properties of BaTiO3-Ni0.5Zn0.5Fe1.5Cr0.5O4 nanocomposite

xBaTiO(3) + (1 - x)Ni0.5Zn0.5Fe1.5Cr0.5O4 (x = 0.35, 0.5, 0.65) nanocomposites were synthesized by the sol-gel method. The two corresponding intended nanocomposites phases were confirmed by X-ray diffraction, no other foreign phases were present. The microstrain of the nanocomposite was found to depend on the ratio amount of BaTiO3 (BTO) in the nanocomposites. The tetragonality ratio c/a of BTO approximates its values to be (a = c) at concentration of 65% BTO. Magnetic properties showed superparamgnetic behavior at room temperature. The temperature dependent of dielectric constant measurements showed that the Curie temperature (T-c) of the ferroelectric phase transition varies with different composites ratio. The dielectric properties of the composite increased with increase of ferrite content. The compressed stress generated by the lattice mismatch of the in planes at the interface of the ferroelectric and magnetic phases cause large strain. The mediation of this strain causes strong electromagnetic coupling creating new materials with good quality. (C) 2013 Elsevier Ltd. All rights reserved.