Abstract
Barium hexaferrite particles prepared by several techniques yield best magnetic characteristics if a certain barium surplus is used. In the case of unsubstituted sol-gel-derived barium hexaferrites, highest values of the specific saturation magnetization occur in powders with n = Fe2O3/BaO = 5.25 in the starting composition. Best magnetic properties are in coincidence with an ideal occupancy of the 12k sites in the magnetoplumbite structure.
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