Synthesis and magnetic study of Co-Al substituted calcium hexaferrite |
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Authors: | K G Rewatkar N M Patil S R Gawali |
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Affiliation: | (1) Department of Physics, Dr Ambedkar College, 440 010 Nagpur, India;(2) Department of Applied Physics, Nagpur University, 440 001 Nagpur, India;(3) Department of Physics, Dr Ambedkar College, 442 401 Chandrapur, India |
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Abstract: | A series of calcium substituted polycrystalline ferrite ceramics with magnetoplumbite structures were synthesized using perfect
stoichiometric mixtures of oxides with chemical composition, CaAlxCoxFe12−2xO19 (x = 2−5), by standard ceramic technique. The variation in the values ofH
candM
s,which depends on the additive content and the temperature, was studied by means of a vibration magnetometer. The strong variation
observed in coercivity, saturation magnetization and Curie temperature with chemical composition give rise to the possibility
of controlling these properties and hence applying these compounds in the millimeter— microwave range. |
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Keywords: | Polycrystalline ferrites saturation magnetization Curie temperature coercivity magnetoplumbite |
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