Abstract
Magnetic nanoparticles of high coercivity with small grain size are useful for high‐density storage media and CoPt alloys are one of the good candidates for this purpose. We have prepared CoPt alloy nanoparticles of different compositions and investigated their magnetic properties before and after annealing the samples. The micellar technique was used to synthesize the particles. The particles of 50:50 composition of Co and Pt in CoPt alloy shows very promising results in magnetic property among different batches.
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