Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11026333 | Journal of Magnetism and Magnetic Materials | 2019 | 25 Pages |
Abstract
Co30Cu10Pt60 nanoparticles were prepared by a simplified polyol process devoid of any surfactants or capping agents. Thermo-magnetic analysis showed that the addition of 10â¯at.% Cu reduces the Curie temperature of Co40Pt60 from 492â¯Â°C to 435â¯Â°C. The incorporation of Cu is effective in reducing the threshold ordering temperature for the A1-fcc to L10-fct phase transformation of CoPt, resulting in coercivity enhancement. Coercivity close to 10â¯kOe at a lower annealing temperature of 600â¯Â°C in Co30Cu10Pt60 demonstrates that high coercivity in CoPt can be achieved in non-equiatomic compositions also. Annealing temperature dependent two phase behavior has been understood by δM studies.
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Authors
Prakash Karipoth, R. Justin Joseyphus,