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M-type hexagonal ferrite powders, Ba 0.5 Sr 0.5 Co x Ru x Fe (12−2x) O 19 (x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2) have been synthesized by conventional ceramic method. Magnetic properties have been investigated as a function of substitution of Co and Ru ions at applied external field of 10kOe. XRD and SEM revealed hexagonal structure for these ferrites...
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