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.
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Yan et al. (2005) studied this question.
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