The preparation and magnetic characterization of CoFe2O4@FeCo core-shell nanoparticles

被引：0
作者：
Yang, Liu [1 ]
An, Jing [1 ]
He, Jun [1 ]
Yuan, Ze-Ming [1 ]
Zhao, Dong-Liang [1 ]
机构：
[1] Functional Materials Research Institute Central Iron and Steel Research Institute, Beijing Key Laboratory of Precision Alloys, Beijing
来源：
Gongneng Cailiao/Journal of Functional Materials | 2015年 / 46卷 / 08期
关键词：
Core-shell structure; Exchange bias; Magnetic nanoparticles;
D O I：
10.3969/j.issn.1001-9731.2015.08.015
中图分类号：
学科分类号：
摘要：
CoFe2O4 nanoparticles were synthesized by the co-precipitation method and core-shell nanoparticles of CoFe2O4@FeCo were obtained by reducing CoFe2O4 nanoparticles under hydrogen atmosphere. The structure and morphology of CoFe2O4@FeCo nanoparticles were characterized by X-ray diffraction and transmission electron microscopy. The room temperature magnetization was analyzed by SQUID. We found that with the increase of shell thickness, the coercivity of core-shell nanoparticles show a trend of decrease after the first increase, and the saturation magnetization keep increasing. In order to explore the exchange interaction of core-shell nanoparticles, we also measured the M-T curves and magnetic hysteresis loops at T=5 K under zero field cooling (ZFC) and field cooling (FC). ©, 2015, Journal of Functional Materials. All right reserved.
引用
收藏
页码：08067 / 08071
页数：4
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