From core/shell structured FePt/Fe3O4/MgO to ferromagnetic FePt nanoparticles

Jaemin Kim; Chuanbing Rong; Youngmin Lee; J. Ping Liu; Shouheng Sun

doi:10.1021/cm8024878

From core/shell structured FePt/Fe₃O₄/MgO to ferromagnetic FePt nanoparticles

Jaemin Kim, Chuanbing Rong, Youngmin Lee, J. Ping Liu, Shouheng Sun

Research output: Contribution to journal › Article › peer-review

Abstract

This paper reports an improved synthesis of hard magnetic fct-FePt nanoparticles (NPs) from reductive annealing of fcc-FePt/Fe₃O ₄/MgO NPs followed by MgO removal. The fcc-FePt/Fe₃O ₄ NPs are made by a one-pot reaction of Pt(acac)₂ with Fe(CO)₅ in the presence of oleic acid and oleylamine and are coated with a layer of MgO via the thermal decomposition of Mg(acac)₂. The MgO coating prevents FePt from sintering under high temperature reductive annealing conditions. The fct-FePt NPs obtained from the 650°C annealing of the fcc-FePt/Fe₃O₄/MgO NPs show a coercivity value of 2 T at 300 K, suitable for various nanomagnetic applications.

Original language	English (US)
Pages (from-to)	7242-7245
Number of pages	4
Journal	Chemistry of Materials
Volume	20
Issue number	23
DOIs	https://doi.org/10.1021/cm8024878
State	Published - Dec 9 2008
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

Online availability

10.1021/cm8024878

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title = "From core/shell structured FePt/Fe3O4/MgO to ferromagnetic FePt nanoparticles",

abstract = "This paper reports an improved synthesis of hard magnetic fct-FePt nanoparticles (NPs) from reductive annealing of fcc-FePt/Fe3O 4/MgO NPs followed by MgO removal. The fcc-FePt/Fe3O 4 NPs are made by a one-pot reaction of Pt(acac)2 with Fe(CO)5 in the presence of oleic acid and oleylamine and are coated with a layer of MgO via the thermal decomposition of Mg(acac)2. The MgO coating prevents FePt from sintering under high temperature reductive annealing conditions. The fct-FePt NPs obtained from the 650°C annealing of the fcc-FePt/Fe3O4/MgO NPs show a coercivity value of 2 T at 300 K, suitable for various nanomagnetic applications.",

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T1 - From core/shell structured FePt/Fe3O4/MgO to ferromagnetic FePt nanoparticles

AU - Kim, Jaemin

AU - Rong, Chuanbing

AU - Lee, Youngmin

AU - Liu, J. Ping

AU - Sun, Shouheng

PY - 2008/12/9

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AB - This paper reports an improved synthesis of hard magnetic fct-FePt nanoparticles (NPs) from reductive annealing of fcc-FePt/Fe3O 4/MgO NPs followed by MgO removal. The fcc-FePt/Fe3O 4 NPs are made by a one-pot reaction of Pt(acac)2 with Fe(CO)5 in the presence of oleic acid and oleylamine and are coated with a layer of MgO via the thermal decomposition of Mg(acac)2. The MgO coating prevents FePt from sintering under high temperature reductive annealing conditions. The fct-FePt NPs obtained from the 650°C annealing of the fcc-FePt/Fe3O4/MgO NPs show a coercivity value of 2 T at 300 K, suitable for various nanomagnetic applications.

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