- Turkish Journal of Physics
- Vol: 38 Issue: 2
- Annealing effect on zinc nanoferrite particles synthesized by spray pyrolysis of polymer precursor
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 : 13 | Download : 5
Publication Date : 9999-12-31
Article Type : Makaleler
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 (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