Improved magnetic properties of SrFe12O19/FeCo core-shell nanofibers by hard/soft magnetic exchange-coupling effect

被引：43

作者：

Dong, Juan ^{[1
]}

Zhang, Yi ^{[1
]}

Zhang, Xinlei ^{[1
]}

Liu, Qingfang ^{[1
]}

Wang, Jianbo ^{[1
]}

机构：

[1] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Inst Appl Magnet, Lanzhou 730000, Peoples R China

来源：

MATERIALS LETTERS | 2014年 / 120卷

关键词：

Composite material; Alloy; Core-shell structure; Magnetic property; Exchange-coupling;

D O I：

10.1016/j.matlet.2014.01.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hard/soft SrFe12O19/FeCo composite nanofibers with core-shell structure have been synthesized by reduction process in a hydrogen atmosphere. As the precursor, SrFe12O19/CoFe2O4 core-shell nanofibers were prepared by coaxial electrospinning and calcination process. SrFe12O19/CoFe2O4 composite ferrites were formed after calcined at 900 degrees C for 1 h. The core-shell nanofibers show an enhanced saturation magnetization (M-s) of 60.9 emu/g for SrFe12O19/CoFe2O4 and 68.8 emu/g for SrFe12O19/FeCo comparing with SrFe12O19 nanofibers (53.4 emu/g). The coercivities (H-c) for SrFe12O19/CoFe2O4 and SrFe12O19/FeCo core-shell nanofibers decrease to 3190 Oe and 1249 Oe, respectively. The hysteresis loop for SrFe12O19/FeCo core-shell nanofibers shows a single-phase magnetization behavior. The improvement in magnetic properties for core-shell structure composite nanofibers is attributed to the exchange-coupling interaction between the hard and soft phases. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：9 / 12

页数：4

共 12 条

[1] Controlled encapsulation of hydrophobic liquids in hydrophilic polymer nanofibers by co-electrospinning [J].