CoPt nanoparticles by chemical reduction

被引：14

作者：

Wang, H. L. ^{[1
]}

Zhang, Y. ^{[1
]}

Huang, Y. ^{[1
]}

Zeng, Q. ^{[1
]}

Hadjipanayis, George C. ^{[1
]}

机构：

[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

chemical reduction; superparamagnetic; nanoparticles; single- and poly-crystalline; HREM;

D O I：

10.1016/j.jmmm.2004.01.050

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

CoPt nanoparticles with a size of 1-2 nm were synthesized by chemical reduction using the solvents of water and alcohol. A phase transformation from the originally disordered face centered cubic (FCC) structure to an ordered face centered tetragonal L1(0) structure occurred after annealing, which results in the coercivity up to 9 kOe because of the high anisotropy of the tetragonal phase (K approximate to 2-4 x 10(7) erg/cm(3)) (Philos. Mag. 13 (1966) 567; IEEE Trans. Magn. 20 (1984) 1625). HREM images of as-grow Co48Pt52 shows the single-crystalline FCC structure with the shape of columnar and spherical. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：E1279 / E1280

页数：2

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