Low-temperature ordering of FePt nanoparticles by alternate reduction of metal salts in aqueous medium

被引：1

作者：

Bai, X. J. ^{[1
]}

Zhang, Y. Y. ^{[1
]}

Chen, L. ^{[1
]}

Cao, C. D. ^{[1
]}

Zhang, W. X. ^{[2
]}

Zhang, W. L. ^{[2
]}

机构：

[1] Northwestern Polytech Univ, Dept Appl Phys, Minist Educ, Key Lab Space Appl Phy & Chem, Xian 710072, Shaanxi, Peoples R China

[2] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Sichuan, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2014年 / 349卷

基金：

中国国家自然科学基金; 国家教育部博士点专项基金资助;

关键词：

FePt nanoparticle; Ordering temperature; Alternate reduction; SIZE;

D O I：

10.1016/j.jmmm.2013.09.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

FePt nanoparticles have been successfully synthesized by the alternate reduction of chloroplatinic acid and ferric chloride, in the presence of acetyl trimethyl ammonium bromide as a surfactant in aqueous medium. Detailed investigations on the structural and magnetic properties of these nanoparticles were presented as a function of annealing temperature. Selected area electron diffraction shows the initiation of phase transition from the as-synthsized phase to ordered face center tetragonal (FCT) at 400 degrees C. The x-ray diffraction and magnetic measurements confirm the transformation to FCT phase at 400 degrees C. The magnetic measurements at room temperature show a double phase hysteresis loop at 400 degrees C and a nearly single phase hysteresis loop at 600 degrees C. with the coercivity of about 3.4 kOe and 16.2 kOe, respectively. We report for the first time this alternate reduction method in synthesizing FePt nanoparticles, obtained a decrease of about 100 degrees C in the ordering temperature. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：284 / 287

页数：4

共 22 条

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