Fabrication of electro deposited Co nanowire arrays with perpendicular anisotropy

被引:22
|
作者
Ge, SH [1 ]
Ma, X [1 ]
Li, C [1 ]
Li, W [1 ]
机构
[1] Lanzhou Univ, Dept Phys, Minist Educ, Appl Magnet Key Lab, Lanzhou 730000, Peoples R China
基金
中国国家自然科学基金;
关键词
electrodeposition; anisotropy-perpendicular; nanowire;
D O I
10.1016/S0304-8853(00)00659-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Co nanowire arrays have been electro deposited into polycarbonate membranes with nanosized pores at different voltages. By means of X-ray diffraction, electron diffraction, vibrating sample magnetometer, their microstructures and magnetic properties were investigated at full length. The sample prepared at - 1.2 V, 250 mA/cm(2) shows perpendicular anisotropy, but the one deposited at - 1.0V, 125 mA/cm(2) has no perpendicular anisotropy. This different magnetic behavior can be explained from their different microstructures. X-ray diffraction and electron diffraction evidence that the former sample is amorphous, and the latter is polycrystalline. In the polycrystalline sample, due to the competition of shape anisotropy and magnetocrystal anisotropy, the sample does not display perpendicular anisotropy. But magnetocrystal anisotropy is very small in amorphous sample, therefore, shape anisotropy plays a dominant role which leads to strong perpendicular anisotropy because of shape anisotropy. Furthermore, applying a magnetic field during deposition, Co grains will preferentially grow with c-axis along the wire axis, which also leads to strong perpendicular anisotropy. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:1867 / 1869
页数:3
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