Enhanced Magnetic Properties of Self-Assembled FePt Nanoparticles with MnO Shell

Self-assembled FePt/MnO nanoparticles with different morphology and size were synthesized with a polyol process. With the MnO coating, FePt nanoparticles exhibit a high blocking temperature and magnetic moment. The low-temperature hysteresis loop of FePt nanoparticles can be shifted through the AFM...

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Veröffentlicht in:	Journal of the American Chemical Society 2006-02, Vol.128 (4), p.1042-1043
Hauptverfasser:	Kang, Shishou, Miao, G. X, Shi, S, Jia, Z, Nikles, David E, Harrell, J. W
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Domain effects, magnetization curves, and hysteresis Exact sciences and technology Iron - chemistry Magnetic properties and materials Magnetics Magnetization curves, hysteresis, Barkhausen and related effects Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects Manganese Compounds - chemistry Nanostructures - chemistry Oxides - chemistry Physics Platinum - chemistry
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Beschreibung
Zusammenfassung:	Self-assembled FePt/MnO nanoparticles with different morphology and size were synthesized with a polyol process. With the MnO coating, FePt nanoparticles exhibit a high blocking temperature and magnetic moment. The low-temperature hysteresis loop of FePt nanoparticles can be shifted through the AFM pinning of the MnO shell. The aggregation of FePt nanoparticles during the L10 phase transformation can be significantly decreased by coating with the MnO shell.
ISSN:	0002-7863 1520-5126
DOI:	10.1021/ja057343n