Composition dependence of the magnetic properties of CoFe2O4/CoFe2 composite nano-ceramics

被引：15

作者：

Ou-Yang, Jun ^{[1
]}

Zhang, Yue ^{[1
]}

Luo, Xiaoning ^{[1
]}

Yan, Baiqian ^{[1
]}

Zhu, Benpeng ^{[1
]}

Yang, Xiaofei ^{[1
]}

Chen, Shi ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Sintering; Composites; Magnetic properties; Ferrites; EXCHANGE; PARTICLES; NANOCOMPOSITE; COERCIVITY;

D O I：

10.1016/j.ceramint.2014.11.071

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

CoFe2O4/CoFe2 composite nano-ceramics with varying composition ratios were synthesized using a reduction reaction and spark plasma sintering. The compositions and particle sizes of the ceramics were then characterized using X-ray diffraction, and the mass ratios were quantitatively determined via thermal-gravity analysis. The magnetic property characteristics indicate that the coercivity decreased significantly with an increase in the soft-magnetic CoFe2 content, while the saturation magnetization drastically increased. In addition, a characterization of the Henkel plots showed a clear enhancement of the inter-phase exchange coupling when the number of soft-magnetic CoFe2 nano-particles was increased. Enhanced exchange coupling at the interface between the soft-magnetic and the hard-magnetic phases is critical for the occurrence of exchange-spring behavior, which has potential applications in the field of information technology. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：3896 / 3900

页数：5

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