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Abstract
[Y 1.05Bi 0.75Ca 1.2](Fe 4.4− x In x V 0.6)O 12(In x :Bi-CVG) ferrite material has been prepared successfully by a solid-state reaction method. The effects of In 3+ substitution and sintering temperatures on the bulk density, microstructure and magnetic properties are performed by X-ray diffraction (XRD), scanning electron microscopy (SEM), materials automatic test system (MATS) and microwave ferrite parameters meter. The results show that In 3+ can lower the sintering temperatures and enhance the magnetic properties of Bi-CVG ferrite. Besides, all sintered specimens with different In 3+ contents show a single garnet crystal structure. The specimen of [Y 1.05Bi 0.75Ca 1.2](Fe 4In 0.4V 0.6)O 12 sintered at 1075 °C shows homogenous distribution of grain size and densified microstructures. The ferromagnetic resonance linewidth (Δ H) has an increase with In 3+ contents. Additionally, the sample has the optimum magnetic properties: ρ=5.23 g/cm 3, B r =31.3 mT, H c=378.8 A/m, 4πM s =506.2×10 −4 T.
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