Effects of SiO2 content on the structure and magnetic properties of L10-FePt nanoparticles synthesized by the sol-gel method

被引：12
|
作者：
Yang, Jinghai [1 ]
Jiang, Yuhong [1 ]
Liu, Yang [1 ]
Zhang, Xiaolong [1 ]
Wang, Yaxin [1 ]
Zhang, Yongjun [1 ]
Wang, Jian [1 ]
Li, Wei [1 ]
Cheng, Xin [1 ]
机构：
[1] Jilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R China
来源：
MATERIALS LETTERS | 2013年 / 91卷
关键词：
FePt nanoparticles; Magnetic materials; Sol-gel preparation; Silica shells; FEPT NANOPARTICLES; MICROSTRUCTURE; SIZE;
D O I：
10.1016/j.matlet.2012.08.125
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
SiO2-coated L1(0)-FePt nanoparticles were successfully synthesized by the sol-gel method, and the effects of SiO2 content on the.structure and magnetic properties of the samples were investigated. Thanks to a silica coating, agglomeration is restrained even if the annealing temperature increases up to 700 degrees C, and the silica shells decrease magnetic dipole coupling between FePt nanoparticles. The results of energy dispersive spectroscopy (EDS) analysis further testify that the L1(0)-FePt NPs are successfully coated with SiO2. The SiO2-coated L1(0)-FePt nanoparticles show a high coercivity of 8096 Oe at room temperature in spite of their core size of only 7 nm in diameter. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：348 / 351
页数：4
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