Abstract
Gadolinium substituted Li–Ni soft ferrites with the general formula (Li 0.5 Fe 0.5) 0.5 Ni 0.5 Gd y Fe 2− y O 4, (where 0 ≤ y ≤ 0.1) were prepared by standard chemical solid reaction technique. The effects of sintering temperature on the microstructure were investigated. The results exhibit the formation of simple cubic spinel phase with variation in lattice parameters that are associated with the substitution of large size Gd 3+ ions. The SEM micrographs show that the high content of Gd 3+ ions might prevent grain growth while the effects of sintering temperature on grain size are significant. The Seebeck coefficient, which was determined from the thermo emf measurements, was found to be negative. It demonstrates the majority of charge carriers of n-type, suggests that the mechanism of conduction is predominant caused by hopping of electrons. The resistivity was increased with the increase in Gd substitution, while it decreased significantly with increasing sintering temperature. The dielectric loss factor was found to increase with sintering temperature.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.