Sintering prevention and phase transformation of FePt nanoparticles

被引：41

作者：

Ding, Y

Majetich, SA ^{[1
]}

Kim, J

Barmak, K

Rollins, H

Sides, P

机构：

[1] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

[2] Carnegie Mellon Univ, MSE Dept, Pittsburgh, PA 15213 USA

[3] Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA

[4] Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 284卷

基金：

美国国家科学基金会;

关键词：

FePt; nanoparticles; sintering; pressure;

D O I：

10.1016/j.jmmm.2004.07.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two approaches attempted to overcome FePt nanoparticle sintering during the transformation to the high coercivity L 1(0) phase, which currently limits the use of these nanoparticles in data storage media. High-pressure treatment of dilute nanoparticle solutions failed to prevent sintering due to surfactant decomposition above 360 degreesC. By pre-annealing nanoparticle monolayers to decompose the surfactant, and then coating with an immiscible SiO2 matrix, sintering was prevented with annealing temperatures up to 700 degreesC. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：336 / 341

页数：6

共 8 条

[1] Phase transformation and magnetic moment in FePt nanoparticles [J].