Enhanced Chemical Ordering and Coercivity in FePt Alloy Nanoparticles by Sb-Doping

Enhanced Chemical Ordering and Coercivity in FePt Alloy Nanoparticles by Sb-Doping

Sb doping stabilizes the chemically ordered tetragonal L10 structure in FePt alloy nanoparticles, yielding higher coercivities (Hc) at lower annealing temperatures (see Figure) than previously reported. Upon annealing to ∼ 300 °C, nanoparticles yield coercivities more than ten times those previously...

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Veröffentlicht in:Advanced materials (Weinheim) 2005-09, Vol.17 (18), p.2233-2237
Hauptverfasser: Yan, Q., Kim, T., Purkayastha, A., Ganesan, P. G., Shima, M., Ramanath, G.
Format: Artikel
Sprache:eng
Schlagworte:
Antimony
Doping
magnetic
Magnetic materials
Nanoparticles
Nanoparticles, magnetic
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Zusammenfassung:Sb doping stabilizes the chemically ordered tetragonal L10 structure in FePt alloy nanoparticles, yielding higher coercivities (Hc) at lower annealing temperatures (see Figure) than previously reported. Upon annealing to ∼ 300 °C, nanoparticles yield coercivities more than ten times those previously reported for FePt nanoparticles of similar sizes annealed to the same temperature. These findings are of importance for ultrahigh‐density memory device applications.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200500949