Abstract

• Aluminium doped Nickel-ferrite nanoparticles of general formula: NiAlxFe2−xO4 (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) have been synthesized by sol-gel auto combustion method involving final sintering at 900ºC with a heating rate of 5 hours. The phase formations of the sintered samples were characterized by X-ray Diffraction analysis. The X-ray diffraction patterns confirmed formation of ferrite with single phase cubic spinel structure with the appearance of small peaks representing secondary phases. The electrical properties of samples have been measured using Fluke- 189 LCR meter in the low frequency range (1-1000) kHz and higher frequency range (1 kHz to 10GHz).