Abstract
We have studied the role of Dy3+ doping on the XRD, TEM, FTIR, and dielectric and electrical properties of CoFe2O4 at room temperature. Cubic spinel phase of CoFe2−xDyxO4 (x = 0.00, 0.05, 0.10, and 0.15) was synthesized by using different sintering temperatures (300, 500, 700, and 900°C). The two absorption bands ν1 and ν2 are observed in Fourier transform infrared spectroscopy (FTIR) spectra corresponding to the tetrahedral and octahedral sites, which show signature of spinel structure of the sample. For the sample sintered at 300°C, the dielectric constant is almost unchanged with the frequency at the particular concentrations of x = 0.00 and 0.05. Similar result is obtained for the sample sintered at 500°C (x = 0.10, 0.15), 700°C (x = 0.05, 0.10, and 0.15), and 900°C (x = 0.05, 0.10). An increase in the dielectric constant was observed for the undoped cobalt ferrite sintered at 500, 700, and 900°C. The values of electrical resistivity of the materials vary from ~105 to 109 Ω-cm.
Highlights
Spinel ferrites have general formula MO: Fe2O3 where M is Zn2+, Ni+2, Co+2, and so forth
For the sample sintered at 300∘C, the dielectric constant is almost unchanged with the frequency at the particular concentrations of x = 0.00 and 0.05
Similar result is obtained for the sample sintered at 500∘C (x = 0.10, 0.15), 700∘C (x = 0.05, 0.10, and 0.15), and 900∘C (x = 0.05, 0.10)
Summary
Spinel ferrites have general formula MO: Fe2O3 where M is Zn2+, Ni+2, Co+2, and so forth. Nanoferrites exhibit unusual electrical, magnetic, and optical properties which are sensitive to their structure, method of synthesis, particle size, and type of dopant ions. These materials crystallize into a cubic closed-packed structure of oxygen ions. The structural, electrical, and magnetic studies of Gd3+ doped cobalt ferrite nanoparticles were investigated and these materials show low loss, high resistivity, and soft magnetic properties due to Gd3+ doping [9]. There are several issues related to the rare earth ions doping in ferrites such as limited solubility of rare earth ions and its effect on the electrical and magnetic properties which are not well understood. The present work is carried out to get an insight of the underlying physics by performing XRD, TEM, Fourier transform infrared spectroscopy (FTIR), and dielectric and electrical resistivity measurements of Dy3+ doped ferrite
Sign-in/Register to view highlights & summary 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.
