Direct synthesis of fct-FePt nanoparticles by chemical route

被引：112

作者：

Jeyadevan, B ^{[1
]}

Urakawa, K

Hobo, A

Chinnasamy, N

Shinoda, K

Tohji, K

Djayaprawira, DDJ

Tsunoda, M

Takahashi, M

机构：

[1] Tohoku Univ, Dept Geosci & Technol, Aoba Ku, Sendai, Miyagi 9808579, Japan

[2] Tohoku Univ, Dept Elect Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 2003年 / 42卷 / 4A期

关键词：

FePt; nanoparticles; fct-FePt; L1(0) phase; super lattice reflections; polyol process; direct synthesis; coercive field; hysteresis loss analysis;

D O I：

10.1143/JJAP.42.L350

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Direct synthesis of fct-FePt nanoparticles was achieved by reducing platinum and iron acetylacetonates in tetraethylene glycol (TEG) at 300degreesC. The particle diameter was between 5 and 10 nm. The X-ray diffraction profile of the as-prepared FePt particles exhibited the superlattice reflections (001) and (110), which signified the tetragonality. The H-k of 31 kOe measured at room temperature (RT) from hysteresis loss analysis confirmed the presence of FePt particles with fractionally ordered fct structure which posses substantially high anisotropy. However, the RT coercivity was only 370 Oe due to strong magnetostatic interaction of the particles.

引用

页码：L350 / L352

页数：3

共 13 条

[1] Synthesis of spherical FePd and CoPt nanoparticles [J].

Chen, M ;

Nikles, DE .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) :8477-8479

[2]

CHINNASAMY CN, 2003, IN PRESS J APPL PHYS

[3] Particle size effects on transformation kinetics and phase stability in nanocrystalline TiO2 [J].

Gribb, AA ;

Banfield, JF .

AMERICAN MINERALOGIST, 1997, 82 (7-8) :717-728

[4]

JEYADEVAN B, 2003, IN PRESS J APPL PHYS

[5]

JEYADEVAN B, 2002, 26 ANN C MAGN JAP TO, P36

[6]

JEYADEVAN B, 2002, MMIJ M, P133

[7] Reduction of the fcc to L10 ordering temperature for self-assembled FePt nanoparticles containing Ag [J].

Kang, S ;

Harrell, JW ;

Nikles, DE .

NANO LETTERS, 2002, 2 (10) :1033-1036

[8] Low-temperature ordering of L10-CoPt thin films promoted by Sn, Pb, Sb, and Bi additives [J].

Kitakami, O ;

Shimada, Y ;

Oikawa, K ;

Daimon, H ;

Fukamichi, K .

APPLIED PHYSICS LETTERS, 2001, 78 (08) :1104-1106

[9]

Perales-Perez O, 2001, IPAP CONFERENCE SER, V3, P105

[10] Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices [J].

Sun, SH ;

Murray, CB ;

Weller, D ;

Folks, L ;

Moser, A .

SCIENCE, 2000, 287 (5460) :1989-1992

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