Structural, Electric and Magnetic Properties of Multiferroic Ni0.6Mg0.4Fe2O4 + BaZr0.2Ti0.8O3 Composites

Abstract

Magnetoelectric (ME) composites (x) Ni0.6Mg0.4Fe2O4) + (1-x) (BaZr0.2Ti0.8O3) were synthesized by using solid state reaction technique, followed by uniaxial pressing and sintering process at 1150 °C. Effects of ferrite/ferroelectric composition on structural, electric and magnetic properties were studied. XRD analysis revealed the synthesized composites containing ferrite and ferroelectric phases without any impurity phase. The variation of DC electrical resistivity with respect to temperature revealed the semiconducting behaviour. Dielectric properties were confirmed the conduction mechanism of the composites. By changing ferrite content in composites, themagnetic anisotropyof ferrite phase has been tuned up and studied its role on ME response of the composites. It is observed that the magnetic parameters such as saturation magnetization, magnetic moment and coercivity are found to be decreases with increasing ferrite concentration in composites. Also, it is observed that the sample x = 0.1 has the largest value of saturation magnetization (14.035emu/gm), while sample x = 0.3 shows the lowest value (7.204emu/gm). We interpreted the results in the framework of dynamicpiezomagneticcoefficient and also cation distribution in the spinel structure of ferrite phase.