One-pot synthesis of high magnetization air-stable FeCo nanoparticles by modified polyol method

被引：64

作者：

Abbas, Mohamed ^{[1
]}

Islam, Md. Nazrul ^{[1
]}

Rao, B. Parvatheeswara ^{[2
]}

Ogawa, Tomoyuki ^{[3
]}

Takahashi, Migaku ^{[1
,3
]}

Kim, CheolGi ^{[1
]}

机构：

[1] Chungnam Natl Univ, Dept Mat Sci & Engn, Ctr NanoBioEngn & Spintron, Taejon 305764, South Korea

[2] Andhra Univ, Dept Phys, Visakhapatnam 530003, Andhra Pradesh, India

[3] Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan

来源：

MATERIALS LETTERS | 2013年 / 91卷

基金：

新加坡国家研究基金会;

关键词：

Different composition; High moment; FeCo nanoparticles; Polyol process;

D O I：

10.1016/j.matlet.2012.10.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High magnetization FeCo nanoparticles with different Fe/Co ratios have been successfully synthesized by surfactant free simple modified polyol method. Polyethylene glycol (PEG) was used as solvent and reducing agent simultaneously in this synthesis process. All the synthesized samples of FeCo nanoparticles were annealed at 600 degrees C before characterizations. X-ray diffraction (XRD) data on the samples confirm formation of a body-centered-cubic single phase structure in all the compositions. Transmission Electron Microscopy (TEM) data suggest that the annealed FeCo nanoparticles are of 50-90 nm in size. The use of PEG and the annealing procedure employed ensure that the obtained nanoparticles are stable in air. This observation is well supported by both the analysis of Energy Dispersive Spectrometry (EDS) and the images of TEM which establish the formation of a thin passive oxide layer over the FeCo nanoparticles thereby resulting in the stability of the nanoparticles. The physical Property Measurement System (PPMS) reveals that the Fe60Co40 composition among all the samples exhibit highest saturation magnetization of 230.14 emu/g at 5 K. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：326 / 329

页数：4

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