Investigation of Grain Exchange Interaction Effects on The Magnetic Properties of Strontium Hexaferrite Magnets
Abstract
Results of investigation of grain exchange interaction effects on the magnetic properties of strontium hexaferrite (SrO.6Fe2O3 ) based samples are reported. The investigation was subject to the evaluation of magnetic properties of three samples prepared in three different routes. Sample A was prepared through the refinement of mechanically alloyed powders. Sample B was obtained from the mechanically alloyed of sample A and subsequently irradiated ultrasonically. Whereas the sample C was obtained through mechanically alloyed powder of sample A with the addition of 15% poly vinyl alcohol (PVA) as the non-magnetic binding agent. Subject to phase identification and evaluation of x-ray diffraction data for sample A and B, it was found that both samples are fully crystalline single-phase materials with mean crystallite size respectively 25 nm and 13 nm. Both samples have indicated a high value of M
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