Preparation of non coagulated FePtCu nanoparticles with high coercivity

H. Kura; T. Sato

doi:10.1002/pssc.200405490

Preparation of non coagulated FePtCu nanoparticles with high coercivity

H. Kura, T. Sato

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

1 Citation (Scopus)

Abstract

FePtCu nanoparticles with various compositions were synthesized by the simultaneous polyol reduction of Pt(acac)₂ and Cu(acac)₂ and the thermal decomposition of Fe(CO)₅. A transformation from fee structure of the as-made samples to fct structure was observed in some samples after annealing at 400°C for 1 hour. The maximum value of stability factor, K_uV, of 1.14 × 10^-12 erg (Ku: uniaxial anisotropy energy, V: switching volume) was estimated in Fe₃₆Pt ₄₂Cu₂₂ nanoparticles with an average radius of 5.5 nm. This value is comparable to that of the Fe₅Pt₄₅ nanoparticles annealed at 550°C for 30 minute. We evaluated the value of Ku of 1.3 × 10⁷ erg/cm³ using the average volume of the nanoparticles.

Original language	English
Pages (from-to)	3499-3502
Number of pages	4
Journal	Physica Status Solidi C: Conferences
Volume	1
Issue number	12
DOIs	https://doi.org/10.1002/pssc.200405490
Publication status	Published - 2004
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics

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abstract = "FePtCu nanoparticles with various compositions were synthesized by the simultaneous polyol reduction of Pt(acac)2 and Cu(acac)2 and the thermal decomposition of Fe(CO)5. A transformation from fee structure of the as-made samples to fct structure was observed in some samples after annealing at 400°C for 1 hour. The maximum value of stability factor, KuV, of 1.14 × 10-12 erg (Ku: uniaxial anisotropy energy, V: switching volume) was estimated in Fe36Pt 42Cu22 nanoparticles with an average radius of 5.5 nm. This value is comparable to that of the Fe5Pt45 nanoparticles annealed at 550°C for 30 minute. We evaluated the value of Ku of 1.3 × 107 erg/cm3 using the average volume of the nanoparticles.",

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AU - Kura, H.

AU - Sato, T.

PY - 2004

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AB - FePtCu nanoparticles with various compositions were synthesized by the simultaneous polyol reduction of Pt(acac)2 and Cu(acac)2 and the thermal decomposition of Fe(CO)5. A transformation from fee structure of the as-made samples to fct structure was observed in some samples after annealing at 400°C for 1 hour. The maximum value of stability factor, KuV, of 1.14 × 10-12 erg (Ku: uniaxial anisotropy energy, V: switching volume) was estimated in Fe36Pt 42Cu22 nanoparticles with an average radius of 5.5 nm. This value is comparable to that of the Fe5Pt45 nanoparticles annealed at 550°C for 30 minute. We evaluated the value of Ku of 1.3 × 107 erg/cm3 using the average volume of the nanoparticles.

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Preparation of non coagulated FePtCu nanoparticles with high coercivity

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