Abstract
Spinel ferrites with chemical formula CuPryFe2-yO4(y=0.0,0.02,0.04,0.06,0.08,0.10) were synthesized using sol-gel technique. The sintered powder characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and vibrating sample magnetometer (VSM). X-ray Diffraction analysis showed that the samples with concentration (y=0.0–0.06) have single spinel phase and the samples with concentration at y=0.08–0.10 have secondary phase (ortho ferrite phase) along spinel phase. The Lattice constant a increased with the substitution of Praseodymium (Pr) ions. The crystallite size calculated from Scherre's formula is found in the range of 53–37nm. It is observed that DC resistivity and activation energy enhances with the substitution of Pr. The dc resistivity decreased with the increase in temperature. The conduction below Curie temperature (Tc) is due to hopping of electrons and holes, whereas, above Curie temperature it is due to polaron hopping. The decrease in Tc with increasing Pr constant may be due to the fact that Pr–Fe interactions on the B sites are weaker than Fe–Fe interaction. The saturation magnetization (Ms) and remanence (Mr) decreased where as coercivity (Hc) has been increased with the increase of Pr content. The measured parameters suggest that these materials are potential candidates for high frequency applications.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
