Preparation and properties of ferromagnetic FePt dispersion

K. Sato; B. Jeyadevan; K. Tohji

doi:10.1016/j.jmmm.2004.11.002

Preparation and properties of ferromagnetic FePt dispersion

K. Sato, B. Jeyadevan, K. Tohji

ENG - Materials Science

Tohoku University

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

23 Citations (Scopus)

Abstract

FePt nanoparticles were prepared via the coreduction of platinum and iron acetyl acetonate precursors in tetraethylene glycol at various temperatures. The X-ray diffractogram of the as-synthesized FePt nanoparticles at temperatures above 573 K exhibited (0 0 1) and (1 1 0) superlattice reflections. TEM-EDX studies revealed that the average particle diameter was 5 nm with nearly equiatomic composition. The saturation magnetization and coercivity at room temperature (RT) were found to be 50 emu/g and 2.1 kOe, respectively. The high anisotropy field of about 32 kOe and magnetic ordering at RT revealed the presence of the highly anisotropic L1₀ phase. These particles were partially dispersed in an organic solvent using oleyl amine as surfactant. The dispersed FePt nanoparticles will be useful in future technological applications.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	289
DOIs	https://doi.org/10.1016/j.jmmm.2004.11.002
Publication status	Published - 2005 Mar

Keywords

Dispersed FePt
FePt
FePt magnetic fluids
FePt nanoparticles
High coercivity

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10.1016/j.jmmm.2004.11.002

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title = "Preparation and properties of ferromagnetic FePt dispersion",

abstract = "FePt nanoparticles were prepared via the coreduction of platinum and iron acetyl acetonate precursors in tetraethylene glycol at various temperatures. The X-ray diffractogram of the as-synthesized FePt nanoparticles at temperatures above 573 K exhibited (0 0 1) and (1 1 0) superlattice reflections. TEM-EDX studies revealed that the average particle diameter was 5 nm with nearly equiatomic composition. The saturation magnetization and coercivity at room temperature (RT) were found to be 50 emu/g and 2.1 kOe, respectively. The high anisotropy field of about 32 kOe and magnetic ordering at RT revealed the presence of the highly anisotropic L10 phase. These particles were partially dispersed in an organic solvent using oleyl amine as surfactant. The dispersed FePt nanoparticles will be useful in future technological applications.",

keywords = "Dispersed FePt, FePt, FePt magnetic fluids, FePt nanoparticles, High coercivity",

author = "K. Sato and B. Jeyadevan and K. Tohji",

note = "Funding Information: This study was supported by Grant-in-Aid for Basic Research #(B) 15360003, #(S) 14103016, and #(S) 13852016 from the Ministry of Education, Science, Culture and Sport of Japan and # H14-nano-021 from the Ministry of Health, Labor and Welfare.",

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doi = "10.1016/j.jmmm.2004.11.002",

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T1 - Preparation and properties of ferromagnetic FePt dispersion

AU - Sato, K.

AU - Jeyadevan, B.

AU - Tohji, K.

N1 - Funding Information: This study was supported by Grant-in-Aid for Basic Research #(B) 15360003, #(S) 14103016, and #(S) 13852016 from the Ministry of Education, Science, Culture and Sport of Japan and # H14-nano-021 from the Ministry of Health, Labor and Welfare.

PY - 2005/3

Y1 - 2005/3

N2 - FePt nanoparticles were prepared via the coreduction of platinum and iron acetyl acetonate precursors in tetraethylene glycol at various temperatures. The X-ray diffractogram of the as-synthesized FePt nanoparticles at temperatures above 573 K exhibited (0 0 1) and (1 1 0) superlattice reflections. TEM-EDX studies revealed that the average particle diameter was 5 nm with nearly equiatomic composition. The saturation magnetization and coercivity at room temperature (RT) were found to be 50 emu/g and 2.1 kOe, respectively. The high anisotropy field of about 32 kOe and magnetic ordering at RT revealed the presence of the highly anisotropic L10 phase. These particles were partially dispersed in an organic solvent using oleyl amine as surfactant. The dispersed FePt nanoparticles will be useful in future technological applications.

AB - FePt nanoparticles were prepared via the coreduction of platinum and iron acetyl acetonate precursors in tetraethylene glycol at various temperatures. The X-ray diffractogram of the as-synthesized FePt nanoparticles at temperatures above 573 K exhibited (0 0 1) and (1 1 0) superlattice reflections. TEM-EDX studies revealed that the average particle diameter was 5 nm with nearly equiatomic composition. The saturation magnetization and coercivity at room temperature (RT) were found to be 50 emu/g and 2.1 kOe, respectively. The high anisotropy field of about 32 kOe and magnetic ordering at RT revealed the presence of the highly anisotropic L10 phase. These particles were partially dispersed in an organic solvent using oleyl amine as surfactant. The dispersed FePt nanoparticles will be useful in future technological applications.

KW - Dispersed FePt

KW - FePt

KW - FePt magnetic fluids

KW - FePt nanoparticles

KW - High coercivity

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U2 - 10.1016/j.jmmm.2004.11.002

DO - 10.1016/j.jmmm.2004.11.002

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SN - 0304-8853

VL - 289

SP - 1

EP - 4

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Preparation and properties of ferromagnetic FePt dispersion

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Keywords

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