Composition-controlled synthesis, structure and magnetic properties of ternary FexCoyNi100-x-y alloys attached on carbon nanotubes

被引：26

作者：

Wu, Hua-Qiang ^{[1
]}

Xu, Dong-Mei ^{[1
]}

Wang, Qiang ^{[1
]}

Wang, Qian-Yi ^{[1
]}

Su, Gui-Qin ^{[1
]}

Wei, Xian-Wen ^{[1
]}

机构：

[1] Anhui Normal Univ, Anhui Key Lab Funct Mol Solids, Coll Chem & Mat Sci, Wuhu 241000, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 463卷 / 1-2期

关键词：

carbon nanotubes; FeCoNi alloy; magnetic properties; composition;

D O I：

10.1016/j.jallcom.2007.09.073

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

FexCoyNi100-x-y alloy nanoparticles with controllable compositions attached on the surface of carbon nanotubes (CNTs) were synthesized using an easy two-step route including adsorption and reduction processes. The nanocomposites have been characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), energy-disperse X-ray spectroscopy (EDS) and vibrating sample magnetometer (VSM). The effect of the alloy composition on microstructure and magnetic properties of ternary FeCoNi alloys attached on carbon nanotubes have been studied. During the nominal composition range (x = 21, 24, 33, 37, 46 and y = 60, 46, 48, 48, 35), FexCoyNi100-x-y alloy nanoparticles attached on CNTs are quasi-spherical, fcc-bcc dual phase, and the coercivity (H-c) and saturation magnetization (M-s) vary with the alloy composition. The H-c of FexCoyNi100-x-y alloy nanoparticles attached on CNTs decreases and M-s increases with increasing Fe content. These demonstrate that the two-step route is promising for fabricating alloy nanoparticles attached on CNTs for magnetic storage and ultra high-density magnetic recording applications. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：78 / 83

页数：6

共 31 条

[1] Decoration of activated carbon nanotubes with copper and nickel [J].