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Submicron-size particles of M-type Sr ferrite were obtained from fine Fe2O3 and precipitated SrCO3. The magnetic properties of the powder were ??s=71 emu/g and HcJ=5.5 kOe. The HcJ of the powder was reduced to less than 40% of its initial value by dry vibration milling. SEM observations showed that the primary particle size distribution was not much different from that in the initial state. Crystal...
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