Thirupathi G | University of Hyderabad (original) (raw)
Related Authors
Centre National de la Recherche Scientifique / French National Centre for Scientific Research
Uploads
Papers by Thirupathi G
In the present study, we report the synthesis of Zn-ferrite nanoparticles by a soft chemical copr... more In the present study, we report the synthesis of Zn-ferrite nanoparticles by a soft chemical coprecipitation method. The magnetic properties of Zn ferrite are sensitive to their average crystallite size ( ) which can be varied by altering the synthesis conditions. The value was controlled by the pH of the solution which is related to the number of moles of OH ions ( ). The XRD pattern of as synthesized samples showed single phase spinel structure. The estimated is in the range of 2 to 12 nm. The magnetization studies showed that the sample with nm is paramagnetic whereas the samples with nm exhibited superparamagnetic behavior. The magnetization at 10 kG increases from 2.6 to 21.4 emu/g as increases from 2 to 12 nm. The temperature dependent studies for the sample with nm shows symmetric spectra with single resonance peak of Lorentzian shape. As the temperature decreases an additional peak at lower field side of the main signal appears. The value and the linewidth increase with decrease in temperature indicating the increase in antiferromagnetic (AFM) interactions between the ions in tetrahedral and the octahedral sites.
In the present study, we report the synthesis of Zn-ferrite nanoparticles by a soft chemical copr... more In the present study, we report the synthesis of Zn-ferrite nanoparticles by a soft chemical coprecipitation method. The magnetic properties of Zn ferrite are sensitive to their average crystallite size ( ) which can be varied by altering the synthesis conditions. The value was controlled by the pH of the solution which is related to the number of moles of OH ions ( ). The XRD pattern of as synthesized samples showed single phase spinel structure. The estimated is in the range of 2 to 12 nm. The magnetization studies showed that the sample with nm is paramagnetic whereas the samples with nm exhibited superparamagnetic behavior. The magnetization at 10 kG increases from 2.6 to 21.4 emu/g as increases from 2 to 12 nm. The temperature dependent studies for the sample with nm shows symmetric spectra with single resonance peak of Lorentzian shape. As the temperature decreases an additional peak at lower field side of the main signal appears. The value and the linewidth increase with decrease in temperature indicating the increase in antiferromagnetic (AFM) interactions between the ions in tetrahedral and the octahedral sites.