Direct chemical synthesis of L10-FePtAu nanoparticles with high coercivity

Yongsheng Yu; P. Mukherjee; Yuan Tian; X. Z. Li; J. E. Shield; D. J. Sellmyer

doi:10.1039/c4nr02345e

Direct chemical synthesis of L1₀-FePtAu nanoparticles with high coercivity

Yongsheng Yu, P. Mukherjee, Yuan Tian, X. Z. Li, J. E. Shield, D. J. Sellmyer

Physics and Astronomy

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

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Abstract

We report a facile synthesis of hard magnetic L1₀-FePtAu nanoparticles by coreduction of Fe(acac)₃, Pt(acac)₂ (acac = acetylacetonate) and gold acetate in oleylamine. In the current reaction condition, NP sizes are controlled to be 5.5 to 11.0 nm by changing the amount of Au doping. When the Au composition in the NPs is higher than 14%, the hard magnetic NPs are directly obtained without any annealing. The highest coercivity of 12.15 kOe at room temperature could be achieved for the NPs with 32% Au doping, which is much higher than the coercivities reported by the previous studies on solution-synthesized FePt nanoparticles. The reported one-pot synthesis of L1₀-FePtAu NPs may help to build superstrong magnets for magnetic or data-storage applications.

Original language	English (US)
Pages (from-to)	12050-12055
Number of pages	6
Journal	Nanoscale
Volume	6
Issue number	20
DOIs	https://doi.org/10.1039/c4nr02345e
State	Published - Oct 21 2014

ASJC Scopus subject areas

General Materials Science

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title = "Direct chemical synthesis of L10-FePtAu nanoparticles with high coercivity",

abstract = "We report a facile synthesis of hard magnetic L10-FePtAu nanoparticles by coreduction of Fe(acac)3, Pt(acac)2 (acac = acetylacetonate) and gold acetate in oleylamine. In the current reaction condition, NP sizes are controlled to be 5.5 to 11.0 nm by changing the amount of Au doping. When the Au composition in the NPs is higher than 14%, the hard magnetic NPs are directly obtained without any annealing. The highest coercivity of 12.15 kOe at room temperature could be achieved for the NPs with 32% Au doping, which is much higher than the coercivities reported by the previous studies on solution-synthesized FePt nanoparticles. The reported one-pot synthesis of L10-FePtAu NPs may help to build superstrong magnets for magnetic or data-storage applications.",

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AU - Yu, Yongsheng

AU - Mukherjee, P.

AU - Tian, Yuan

AU - Li, X. Z.

AU - Shield, J. E.

AU - Sellmyer, D. J.

PY - 2014/10/21

Y1 - 2014/10/21

N2 - We report a facile synthesis of hard magnetic L10-FePtAu nanoparticles by coreduction of Fe(acac)3, Pt(acac)2 (acac = acetylacetonate) and gold acetate in oleylamine. In the current reaction condition, NP sizes are controlled to be 5.5 to 11.0 nm by changing the amount of Au doping. When the Au composition in the NPs is higher than 14%, the hard magnetic NPs are directly obtained without any annealing. The highest coercivity of 12.15 kOe at room temperature could be achieved for the NPs with 32% Au doping, which is much higher than the coercivities reported by the previous studies on solution-synthesized FePt nanoparticles. The reported one-pot synthesis of L10-FePtAu NPs may help to build superstrong magnets for magnetic or data-storage applications.

AB - We report a facile synthesis of hard magnetic L10-FePtAu nanoparticles by coreduction of Fe(acac)3, Pt(acac)2 (acac = acetylacetonate) and gold acetate in oleylamine. In the current reaction condition, NP sizes are controlled to be 5.5 to 11.0 nm by changing the amount of Au doping. When the Au composition in the NPs is higher than 14%, the hard magnetic NPs are directly obtained without any annealing. The highest coercivity of 12.15 kOe at room temperature could be achieved for the NPs with 32% Au doping, which is much higher than the coercivities reported by the previous studies on solution-synthesized FePt nanoparticles. The reported one-pot synthesis of L10-FePtAu NPs may help to build superstrong magnets for magnetic or data-storage applications.

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Direct chemical synthesis of L1₀-FePtAu nanoparticles with high coercivity

Abstract

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