Abstract
Nanostructured CoCu powders were synthesized by coprecipitation of constituent metallic salts using aqueous sodium borohydride. As-synthesized powders showed a fcc structure and an amorphous phase. The amount of amorphous phase was found to increase with the ratio of Co/Cu. Upon annealing the as-synthesizedpowdersphaseseparated into nanocrystalline fcc Co and fcc Cu. Coercivity increased with annealing temperature and reached a maximum value at about 620 Oe, exhibiting the behavior of magnetic granular solids.
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