TY - JOUR
T1 - Preparation of non coagulated FePtCu nanoparticles with high coercivity
AU - Kura, H.
AU - Sato, T.
PY - 2004/12/1
Y1 - 2004/12/1
N2 - 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.
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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U2 - 10.1002/pssc.200405490
DO - 10.1002/pssc.200405490
M3 - Article
AN - SCOPUS:12344292740
VL - 1
SP - 3499
EP - 3502
JO - Physica Status Solidi (C) Current Topics in Solid State Physics
JF - Physica Status Solidi (C) Current Topics in Solid State Physics
SN - 1862-6351
IS - 12
ER -