Magnetic properties of rare earth ion (Sm) added nanocrystalline Mg-Cd ferrites, prepared by oxalate co-precipitation method |
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Authors: | Ashok B Gadkari Tukaram J Shinde |
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Institution: | a Department of Physics, GKG College, Kolhapur 416 012, Indiab Department of Physics, KRP Kanya Mahavidylaya, Islampur 415409, Indiac Department of Electronics, Shivaji University, Kolhapur 416 004, India |
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Abstract: | Nanocrystalline ferrite powder having the general formula Mg1−xCdxFe2O4+5% Sm3+ (x=0, 0.2, 0.4, 0.6, 0.8 and 1.0) was synthesized by chemical oxalate co-precipitation technique. The synthesized powder was characterized by X-ray, IR and SEM techniques. The XRD analysis confirms cubic spinel phase with orthoferrite secondary phase. The lattice constant increases with increase in Cd2+ content (x). It is smaller than that for pure Mg-Cd ferrites. The average crystallite size lies in the range 28.69-32.66 nm. Saturation magnetization and magnetic moment increase with cadmium content up to x=0.4 and decrease thereafter. This is attributed to the existence of localized canted spin. The decrease in saturation magnetization and magnetic moment beyond x=0.4 is due to the presence of triangular spin arrangement on B-site. Coercivity and remanent magnetization decrease while Y-K angles increase with Cd2+ content. The Sm3+ addition improves the magnetic properties. |
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Keywords: | Nanomaterial Magnetic moment XRD Coercivity Y-K angle Mg-Cd ferrite |
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