Magnetic and structural properties of CoPt nanoparticles embedded in Ag
Date
2017
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Publisher
University of Delaware
Abstract
L10 CoPt nanoparticles have very high magnetocrystalline energy that makes them potential candidate for high density recording media. In this study, I have investigated the structural and magnetic properties of CoPt particles embedded in silver. The CoPt nanoparticles were produced from CoPt/Ag multilayers. The thickness of CoPt layer was kept the same, and the thickness of Ag layer was varied. The as-made samples had the fcc structure. Particles with the ordered L10 structure were obtained by annealing the multilayers at a high temperature. The highest coercivity and particle size were found in samples with larger Ag layer thickness. Also, samples with larger Ag layer thickness showed the ordering in lower annealing time and temperature. Samples with smaller Ag layer thickness shows larger degree of ordering in comparison with the ones with larger Ag layer thickness.
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Pure sciences