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Shape control of FePt nanocrystals

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Shape control of FePt nanocrystals

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Title: Shape control of FePt nanocrystals
Author: Poudyal, Narayan; Chaubey, Girija Shankar; Rong, Chuanbing; Liu, J. Ping
Abstract: : FePt nanocrystals were prepared by simultaneous reduction of platinum acetylacetonate and thermal decomposition of iron pentacarbonyl in properly chosen solvents/surfactants. A variety of FePt nanocrystals, including nanowires, nanorods, nanocubes, and nanosized multipods, were successfully obtained. The shape control was realized by simply varying synthesis parameters. The as-synthesized nanocrystals, having chemically disordered fcc structure, are found to be superparamagnetic at room temperature and their ferromagnetic-superparamagnetic transition temperature is size dependent that increases with particle size. The as-synthesized FePt nanocrystals were transformed to the chemically ordered L10 structure upon heat treatment, which exhibits hard magnetic properties with coercivity as high as 25 kOe.
Description: Preceedings of the 53rd Annual Conference on Magnetism and Magnetic Materials.Hard Magnetic Materials
URI: http://hdl.handle.net/10106/4992
Date: 2009-04-06
External Link: http://link.aip.org/link/JAPIAU/v105/i7/p07A749/s1

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