Magnetoelastic Anisotropy Induced Effects on Field and Temperature Dependent Magnetization Reversal of Ni Nanowires and Nanotubes

被引:0
作者
Naeem Ahmad
J. Y. Chen
W. P. Zhou
D. P. Liu
X. F. Han
机构
[1] Chinese Academy of Sciences (CAS),Beijing National Laboratory for Condensed Matter Physics, Institute of Physics
来源
Journal of Superconductivity and Novel Magnetism | 2011年 / 24卷
关键词
Magnetization reversal; Curling mode; Nucleation mode; Shape anisotropy; Magnetoelastic anisotropy;
D O I
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中图分类号
学科分类号
摘要
Vertically aligned Ni nanowires and nanotubes have been electrodeposited in alumina templates at room temperature. The detailed study of angular dependent coercivity and squareness demonstrates that the magnetic easy axis of Ni nanowires is perpendicular to that of Ni nanotubes axis. The mechanisms of magnetization reversal in Ni nanowires and Ni nanotubes are found to occur through the nucleation mode with the propagation of transverse domain wall and curling mode, respectively. Field dependant magnetization results at different temperatures have depicted that the magnetocrystalline anisotropy might cause a crossover of easy axis at room temperature to that of low temperature in both Ni nanowires and nanotubes. Furthermore, the variation in temperature dependent coercivity illustrates that the magnetoelastic anisotropy induced by the alumina matrix plays a dominant role in the magnetization reversal of the nanowires and nanotubes at low temperature.
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页码:785 / 792
页数:7
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