Browsing by Author "CIIT/Fa17-RPH-018/LHR"

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    Synthesize and Characterization of Rare Earth Doped Ferrites
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2019) Ahad Ali Khan; CIIT/Fa17-RPH-018/LHR; Dr. Salman Naeem Khan; LHR TP 5718
    In this study, Yttrium doped Copper ferrite (𝐶𝑢𝐹𝑒2−𝑥𝑌𝑥𝑂4; 𝑥 = 0.1, 0.2, 0.3, 0.4, 0.5) were synthesized through sol-gel auto combustion technique. X-ray diffraction and scanning electron microscope is employed to carry out structural and morphological study of as prepared samples. The XRD patterns confirms the formation copper spinel structure, with increasing concentration of dopant induces an impurity phase of YFeO3. And SEM images display the spherical like particles with decreasing tendency ~ 2.14-1.28 μm. Vibrational modes were examined through Raman and FTIR Spectra. Observed 5 Raman modes of Γ = A1g + E1g + 3T2g affirm spinel structure with M-O bonding in undoped sample while increasing Yttrium concentration shifts the modes and increases the intensity of 3T2g mode at 512.5 nm. FTIR plot the site preference of metallic ions, Cu-O vibration at 651.5 nm corresponds to tetrahedral site. Dielectric and magnetic properties were investigated through Vector Network Analyzer, range from 1-6 GHz. The decrease in real permittivity from ~ 5-3 (F/m) as well as in real permeability ~ 2.5-1.75 (H/m) by increasing Y3+ content. This trend directly correlate with degree of crystallinity. The magnetodielectric properties are suitable for use in radar systems and shielding applications.