Thermal annealing effect on the structural and magnetic properties of barium hexaferrite powders
作者： A. Y. Hudeish , A. Mahgoob
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摘要: Samples examined in this experimental work were the form of hexagonal barium ferrite with various temperatures annealing. Barium hexaferrite (BaFe12O19), is great importance as permanent magnets, particularly for magnetic recording well microwave devices. The variation annealing was found to affect coercivity, mean effective anisotropy field, viscosity, and switching field distribution. Moreover interaction fields be non linear can attributed particle interactions these systems. Single phase crystalline BaFe12O19 first obtained at temperature 1100°C. SEM results showed that grains regular platelets. In addition, maximum saturation magnetization observed 1200°C. However, it coercivety synthesized samples lower than theoretical values.
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