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Magnetic, Dielectric and Electrical Properties of Lithium-Magnesium Ferrites

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A series of polycrystalline spinel type ferrites with composition Li x Mg0.5Ni0.5– 2 x Fe2+ x O4, where x = 0.00 to 0.25 in steps of 0.05, have been prepared by standard double sintering method sintered at temperature 1200 °C in air for 6 hours. In this work, investigations have been carried out by the measurements of X-ray diffraction (XRD), Curie temperature, permeability, loss tangent, Q-factor, dielectric constant and ac electrical resistivity of the samples. Some measurements have been done at room temperature while other measurements have been done as a function of temperature and as a function of frequency in the range from 1 kHz to 500 kHz. Curie temperature, the real part of initial permeability (μ i ), the loss tangent (tan δ), and the Q-factor have been found to be decreased with the increase of Ni-content of Li x Mg0.5Ni0.5– 2 x Fe2+ x O4 ferrites. The frequency characteristic of dielectric constant and AC resistivity decreases with the increase in frequency and increases with the increase in Ni-content.
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Keywords: CURIE TEMPERATURE; DIELECTRIC CONSTANT; ELECTRICAL RESISTIVITY; LOSS TANGENT; SINTERING; SPINEL FERRITES

Document Type: Research Article

Publication date: June 1, 2013

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  • Advanced Chemistry Letters is an international multidisciplinary peer-reviewed journal covering all fundamental and applied research areas of chemical sciences including organic chemistry, inorganic chemistry, synthetic chemistry, medicinal chemistry, analytical chemistry, organometallic chemistry, nuclear chemistry, electrochemistry, atmospheric chemistry, environmental chemistry, materials chemistry, materials science, supramolecular chemistry, physical chemistry, polymer chemistry, bioinorganic chemistry, physical organic chemistry, surface chemistry, biochemistry, molecular biology, chemical biology, food chemistry, natural product chemistry, neurochemistry, pharmacology, photochemistry, photobiology, toxicology, nanoscience, nanotechnology, agrochemistry, green chemistry, marine chemistry, geochemistry, petrochemistry, radiochemistry, astrochemistry, molecular physics, chemical engineering, quantum chemistry, and theoretical and computational chemistry.
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