Magnetic properties of xNi0.53Cu0.12Zn0.35Fe1.88O4+(1−x)BaTiO3 nanocomposites

The nanocrystalline Ni0.53Cu0.12Zn0.35Fe1.88O4 and BaTiO3 powders were prepared using Microwave–Hydrothermal (M–H) method at 160 °C/45 min. The as synthesized powders were characterized using the X-ray diffraction (XRD) and Transmission Electron Microscope (TEM). The size of the powders that were synthesized using M–H system was found to be ∼30 and ∼50 nm for ferrite phase and ferroelectric phases, respectively. The powders were densified using microwave sintering method at 900 °C/30 min. The ferrite and ferroelectric phases were observed from XRD and morphology of the composites was observed with the Scanning Electron Microscope (SEM).The magnetic hysteresis loops were recorded using the Vibrating Sample Magnetometer (VSM).The frequency dependence of real (μ′) and imaginary (μ″) parts of permeability was measured in the range of 1 MHz–1.8 GHz. The permeability decreases with an increase of BaTiO3 content at 1 MHz. The transition temperature (TC) of ferrite was found to be 245 °C. The TC of composite materials decreases with an increase in BaTiO3 content.