Dielectric relaxation behaviour in Y3+ substituted Li0.5Zn0.1Ti0.1Fe2.3O4 spinel ferrites
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Trivalent yttrium, Y3+ substituted lithium-zinc-titanium ferrite with compositional formula Li0.5Zn0.1Ti0.1YxFe2.3-xO4 (x = 0.00,0.02, 0.04, 0.06, 0.08, 0.10) were synthesized by the conventional ceramic method and sintered at 1050°C for 6h. The effect ofY3+ substitution on the structure and microstructure was investigated by using X-ray diffraction (XRD) and Scanning ElectronMicroscopy (SEM) respectively. The X-ray diffraction analysis confirmed the single-phase spinel structure and parameterslike the crystallite size, lattice constant and X-ray density were calculated. The SEM micrograph revealed the grains andgrain distribution of the samples. The Curie temperature showed a decrease with progressive substitution of Y3+. The M-Hloops were traced using a vibrating sample magnetometer (VSM) giving magnetic parameters like saturation magnetization,coercivity and remanence. Ferrites being good dielectrics the temperature variation of the dielectric constant showed a slowincrease initially and then rapidly until it exhibited a maximum and then decreased on a further increase of temperature. The results obtained are analyzed and discussed in the paper.
Abstract
Trivalent yttrium, Y3+ substituted lithium-zinc-titanium ferrite with compositional formula Li0.5Zn0.1Ti0.1YxFe2.3-xO4 (x = 0.00,0.02, 0.04, 0.06, 0.08, 0.10) were synthesized by the conventional ceramic method and sintered at 1050°C for 6h. The effect ofY3+ substitution on the structure and microstructure was investigated by using X-ray diffraction (XRD) and Scanning ElectronMicroscopy (SEM) respectively. The X-ray diffraction analysis confirmed the single-phase spinel structure and parameterslike the crystallite size, lattice constant and X-ray density were calculated. The SEM micrograph revealed the grains andgrain distribution of the samples. The Curie temperature showed a decrease with progressive substitution of Y3+. The M-Hloops were traced using a vibrating sample magnetometer (VSM) giving magnetic parameters like saturation magnetization,coercivity and remanence. Ferrites being good dielectrics the temperature variation of the dielectric constant showed a slowincrease initially and then rapidly until it exhibited a maximum and then decreased on a further increase of temperature. The results obtained are analyzed and discussed in the paper.