Annealing effect on zinc nanoferrite particles synthesized by spray pyrolysis of polymer precursor

Authors : Jessyamma KURIAN, Subin JOHN, Jacob MATHEW

Pages : 228-237

Doi:10.3906/fiz-1401-3

View : 22 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Nanosized zinc ferrite particles, prepared by spray pyrolysis method, were investigated by X-ray diffraction, transmission electron microscopy, energy dispersive spectroscopy, Fe57 Mossbauer spectroscopy, and vibrating sample magnetometer. The cubic crystalline phases were identified in all samples. The lattice parameter insert ignore into journalissuearticles values(a = 8.446 Å); and the average particle size of all the samples were determined. The particle sizes increased as the annealing temperature increased from 250 °C to 550 °C. The variation in structural parameters and particle size estimated from X-ray diffraction patterns of heat-treated samples suggested that the synthesized sample was in a `metastable` state or a compositionally constrained state. The Mossbauer spectra of the annealed samples showed a single doublet, thereby indicating the presence of superparamagnetism. Magnetic studies using vibrating sample magnetometer also confirm the superparamagnetic nature of the material.
Keywords : Nano zinc ferrites, spray pyrolysis, superparamagnetism