Influence of surface ligands on saturation magnetization of FePt nanoparticles
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概要
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The influence of organic ligands on the saturation magnetization (M_S) of chemically disordered face-centered-cubic (fcc) FePt nanoparticles (NPs) was investigated. By increasing the basicity and/or surface coverage of ligands, the M_S of fcc-phase FePt NPs decreases due to an increase in electron donation from the ligand to the Fe d bands. FePt NPs capped with 1-octanethiol or 1-dodecanethiol show larger M_S than as-synthesized NPs capped with oleic acid due to a thinning of the nonmagnetic shell.
- 2008-03-05
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