NiFe2O4-BiFeO3纳米管的制备与磁电特性研究

doi:10.15541/jim20150460

无机材料学报 ›› 2016, Vol. 31 ›› Issue (4): 388-392.DOI: 10.15541/jim20150460

NiFe₂O₄-BiFeO₃纳米管的制备与磁电特性研究

韩伟, 杨淑敏, 李海涛, 岂云开, 顾建军

(河北民族师范学院物理系, 承德 067000)

收稿日期:2015-09-22 修回日期:2015-12-23 出版日期:2016-04-20 网络出版日期:2016-03-25
作者简介:韩伟(1982–), 男, 博士, 副教授. E-mail: hwly2006@163.com
基金资助:
河北省自然科学基金(A2012101001);河北省科技支撑计划(132176278);河北省教育厅自然科学研究青年基金 (QN20132013, QN2014340);河北省承德市财政扶持资助项目(CZ2012007, CZ2013002);河北民族师范学院科研资助项目(201301)

Synthesis and Magnetoelectric Properties of NiFe₂O₄-BiFeO₃ Nanotubes

HAN Wei, YANG Shu-Min, LI Hai-Tao, QI Yun-Kai, GU Jian-Jun

(Department of Physics, Hebei Normal University for Nationalities, Chengde 067000, China)

Received:2015-09-22 Revised:2015-12-23 Published:2016-04-20 Online:2016-03-25
About author:HAN Wei. E-mail: hwly2006@163.com
Supported by:
Natural Science Foundation of Hebei Province (A2012101001);Science and Technology Support Project of Hebei Province (132176278);Scientific Research Project of Higher Schools Youth Foundation of Hebei Province (QN20132013, QN2014340);Finance Bureau Research Projects of Chengde City (CZ2012007, CZ2013002);Science Foundation of Hebei Normal University for Nationalities (201301)

摘要/Abstract

摘要：

采用溶胶-凝胶法在多孔氧化铝模板的纳米孔洞中成功地合成了xNiFe₂O₄-(1-x) BiFeO₃ (NFO-BFO)复合纳米管阵列。扫描电镜照片显示纳米管的外径约为70 nm, 内径约为50 nm, 长度约为80 μm。X射线衍射图谱显示, 通过自组装形成了钙钛矿结构的铁电相BFO和尖晶石结构的铁磁相NFO。磁性和铁电性的测试结果表明, 复合纳米管具有明显的室温铁磁性和电极化性能, 且易磁化方向沿着纳米管的长轴方向。随着NFO复合比例的增加, 纳米管阵列的磁性和电极化性能逐渐增强。NFO对复合纳米管阵列铁磁贡献的计算结果表明, NFO-BFO纳米管阵列中存在着磁电耦合效应。

关键词: 多铁材料, 纳米管, 溶胶-凝胶, 磁电特性

Abstract:

xNFO-(1-x)BFO (NFO-BFO) nanotube arrays were fabricated by means of Sol-Gel method utilizing nanochannel alumina as templates. Scanning electron microscopy study revealed that the outer diameter of nanotube was about 70 nm, and the internal diameter was about 50 nm, the length was about 80 μm. Meanwhile, ferroelectric phase BFO of perovskite structure and ferromagnetic phase NFO of spinel structure were formed through self-assembly growth in X-ray diffraction patterns. Significant ferromagnetic and polarized characteristics of nanotube arrays were demonstrated by means of magnetic and ferroelectric measurement at room temperature, and the direction of easy magnetization was along the long axis. With increasing ratio of NFO, the magnetic and polarized properties of nanotube arrays increased gradually. The calculation results of NFO’s ferromagnetic contribution indicated that magnetoelectric coupling effect existed in the NFO-BFO composite nanotube arrays.

Key words: multiferroic material, nanotube arrays, Sol-Gel, magnetoelectric properties

中图分类号:

TQ174

韩伟, 杨淑敏, 李海涛, 岂云开, 顾建军. NiFe₂O₄-BiFeO₃纳米管的制备与磁电特性研究[J]. 无机材料学报, 2016, 31(4): 388-392.

HAN Wei, YANG Shu-Min, LI Hai-Tao, QI Yun-Kai, GU Jian-Jun. Synthesis and Magnetoelectric Properties of NiFe₂O₄-BiFeO₃ Nanotubes[J]. Journal of Inorganic Materials, 2016, 31(4): 388-392.

图/表 5

图1 AAO模板的SEM照片

Fig. 1 SEM images of AAO template (a) Surface; (b) Cross profile

图2 0.25NFO-0.75BFO纳米管的SEM照片和能谱分析

Fig. 2 SEM images and EDS pattern of 0.25NFO-0.75BFO nanotubes (a) Surface image; (b) EDS pattern; (c) Dispersed nanotubes; (d) Nanotubes cluster

图3 600℃空气退火得到的 xNFO-(1-x)BFO纳米管的XRD图谱

Fig. 3 XRD patterns for xNFO-(1-x)BFO nanotubes annealed at 600℃

图4 室温下xNFO-(1-x)BFO纳米管的P-E曲线

Fig. 4 P-E curves of xNFO-(1-x) BFO nanotubes at room temperature

图5 室温下xNFO-(1-x)BFO纳米管的M-H曲线

Fig. 5 M-H curves of xNFO-(1-x)BFO nanotubes at room temperature. (a) Magnetic field parallel to the long axis of nanotubes; (b) Magnetic field perpendicular to the long axis of nanotubes.

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NiFe₂O₄-BiFeO₃纳米管的制备与磁电特性研究

Synthesis and Magnetoelectric Properties of NiFe₂O₄-BiFeO₃ Nanotubes

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