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Journal of Nanomaterials
Volume 2010 (2010), Article ID 793854, 4 pages
http://dx.doi.org/10.1155/2010/793854
Research Article

Diameter-Controllable Magnetic Properties of Co Nanowire Arrays by Pulsed Electrodeposition

1School of Chemical Engineering, Hefei University of Technology, Hefei 230009, China
2School of Material Science and Engineering, Hefei University of Technology, Hefei 230009, China
3Key Laboratory of Material Physics, Institute of Solid State Physics, Chinese Academy of Science, Hefei 230031, China

Received 24 November 2009; Revised 16 January 2010; Accepted 20 January 2010

Academic Editor: Yanqiu Zhu

Copyright © 2010 Youwen Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The Co nanowires with different diameters were prepared by pulsed electrodeposition into anodic alumina membranes oxide templates. The micrographs and crystal structures of nanowires were studied by FE-SEM, TEM, and XRD. Due to their cylindrical shape, the nanowires exhibit perpendicular anisotropy. The coercivity and loop squareness (Mr/Ms) of Co nanowires depend strongly on the diameter. Both coercivity and Mr/Ms decrease with increasing wire diameter. The behavior of the nanowires is explained briefly in terms of localized magnetization reversal.