Wet-chemical synthesis and properties of CoPt and CoPt3 alloy nanoparticles

被引：9

作者：

Frommen, C ^{[1
]}

Rösner, H ^{[1
]}

Fenske, D ^{[1
]}

机构：

[1] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2002年 / 2卷 / 05期

关键词：

CoPt; CoPt3; alloy nanoparticles; ferromagnetism; long-range order;

D O I：

10.1166/jnn.2002.141

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Surface-protected, air-stable nanoparticles of CoPt and-CoPt3 were prepared by thermal decomposition/reduction of organometallic precursors with a long-chain aliphatic diol, also known as the polyol process. Particles 3 nm in diameter showed ferromagnetic behavior up to 350 K (H-c = 65 Oe at T = 300 K; H-c = 410 Oe at T = 5 K) and underwent a disordering-ordering phase transformation after annealing that resulted in an increase in coercivity (H-c = 170 Oe at T = 300 K; H-c = 2000 Oe at T = 5 K).

引用

页码：509 / 515

页数：7

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