NiCo/Cu多层纳米线的制备、表征以及磁化反转机制研究

杨皓哲; 曾敏; 刘晓芳; 于荣海; 钟华生; 黎业生; 陈一胜

doi:10.7527/S1000-6893.2014.0145

航空学报 >

2014 , Vol. 35 >Issue 10: 2819 - 2825

DOI: https://doi.org/10.7527/S1000-6893.2014.0145

论文

NiCo/Cu多层纳米线的制备、表征以及磁化反转机制研究

杨皓哲 ,
曾敏 ,
刘晓芳 ,
于荣海 ,
钟华生 ,
黎业生 ,
陈一胜

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1. 北京航空航天大学材料科学与工程学院, 北京 100191;
2. 江西理工大学材料科学与工程学院, 江西赣州 341000

杨皓哲男，博士研究生。主要研究方向：低维纳米复合磁性材料。Tel：010-82313786 E-mail：yanghaozhe@mse.buaa.edu.cn ；曾敏男，博士，博士后。主要研究方向：软磁材料，吸波材料。Tel：010-82313786 E-mail：min_zeng@buaa.edu.cn ；刘晓芳女，博士，讲师。主要研究方向：纳米材料，光催化材料。Tel：010-82313786E-mail：liuxf05@buaa.edu.cn ；于荣海男，博士，教授，博士生导师。主要研究方向：磁性材料、能源材料。Tel：010-82317101 E-mail：rhyu@buaa.edu.cn

收稿日期: 2014-05-12

修回日期: 2014-07-09

网络出版日期: 2014-07-11

基金资助

国家"973"计划（2010CB934602）

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Investigation on Preparation, Characterization and Magnetic Reversal Mechanism of NiCo/Cu Multilayer Nanowire

YANG Haozhe ,
ZENG Min ,
LIU Xiaofang ,
YU Ronghai ,
ZHONG Huasheng ,
LI Yesheng ,
CHEN Yisheng

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1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
2. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

Received date: 2014-05-12

Revised date: 2014-07-09

Online published: 2014-07-11

Supported by

National Basic Research Program of China (2010CB934602)

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摘要

采用电化学沉积在多孔氧化铝模板中制备了NiCo/Cu多层结构纳米线，并使用扫描电子显微镜（SEM）和透射电子显微镜（TEM）表征了纳米线的形貌和微观结构。透射电子显微镜的结果表明，通过控制阶梯电位时间，制备的铁磁层厚度为100 nm，非铁磁层厚度为10 nm。结合选区电子衍射技术（SAED）与X射线衍射分析技术（XRD），确定多层纳米线的晶格结构是面心立方（FCC）。在分析多层纳米阵列的微观结构之后，使用振动样品磁强计（VSM）测量磁滞回线。结果表明，随着Co含量的增加，多层纳米线的矫顽力升高。当多层纳米线中Co含量为10%和30%时，易磁化轴垂直于纳米线，当Co含量为70%和90%时，易磁化轴平行于纳米线。最后，对纳米线磁化翻转机制进行微磁学模拟分析得出，当外加磁场垂直于纳米线时，磁化反转机制是形核机制；当外加磁场平行于纳米线时，磁化反转机制是卷曲机制。

关键词： 电化学沉积; 纳米线; 微观结构; 磁性能; 磁化反转机制

本文引用格式

杨皓哲 , 曾敏 , 刘晓芳 , 于荣海 , 钟华生 , 黎业生 , 陈一胜 . NiCo/Cu多层纳米线的制备、表征以及磁化反转机制研究[J]. 航空学报, 2014 , 35(10) : 2819 -2825 . DOI: 10.7527/S1000-6893.2014.0145

Abstract

The NiCo/Cu multilayer nanowires have been fabricated by the porous anodic aluminum oxide assisted electrodeposition. Then, scanning electron microscope (SEM) and transmission electron microscope (TEM) are used to analyze the morphology and nanostructure of the multilayer nanowire. The thickness of the ferromagnetic layer and the non-ferromagnetic layer are controlled to be 100 nm and 10 nm, respectively, by adjusting the deposition time. The results of selected area electron diffraction (SAED) and X-ray diffraction (XRD) show that the crystal structure of the nanowire is face center cubic (FCC) phase. After the microstructure characterization of the multilayer, the hysteresis loops are measured by a vibrating sample magnetometer (VSM). The results indicate that the coercivity of the multilayer nanowire increases with increasing the content of Co. The easy axis of the multilayer stays perpendicular when the content of cobalt is 10% and 30%, while the easy axis tend to be parallel to the nanowire when increasing the ratio of Co to 70% and 90%. At last, the magnetic reversal mechanism is tentatively analyzed by micro-magnetic simulation. The reversal mode is nucleation controlled when the applied field is perpendicular to the nanowire. And when the applied magnetic field is parallel to the nanowire, the magnetic reversal would be controlled by curling.

Key words： electrolytic deposition; nanowires; microstructure; magnetic behavior; magnetic reversal mechanism

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