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

doi:10.7527/S1000-6893.2014.0145

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

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

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

Articles

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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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

Cite this article

YANG Haozhe , ZENG Min , LIU Xiaofang , YU Ronghai , ZHONG Huasheng , LI Yesheng , CHEN Yisheng . Investigation on Preparation, Characterization and Magnetic Reversal Mechanism of NiCo/Cu Multilayer Nanowire[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(10) : 2819 -2825 . DOI: 10.7527/S1000-6893.2014.0145

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