Synthesis of High Coercivity Core-Shell Nanorods Based on Nickel and Cobalt and Their Magnetic Properties

Hybrid magnetic nanostructures with high coercivity have immense application potential in various fields. Nickel (Ni) electrodeposited inside Cobalt (Co) nanotubes (a new system named Ni @ Co nanorods) were fabricated using a two-step potentiostatic electrodeposition method. Ni @ Co nanorods were cr...

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Bibliographic Details
Published in:Nanoscale research letters 2009-10, Vol.5 (1), p.164-168
Main Authors: Narayanan, T. N, Shaijumon, M. M, Ajayan, P. M, Anantharaman, M. R
Format: Article
Language:English
Subjects:
Core-shell nanostructures
Hybrid nanostructures
Magnetic nanowires
Mobility-assisted growth mechanism
Nanorods
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Summary:Hybrid magnetic nanostructures with high coercivity have immense application potential in various fields. Nickel (Ni) electrodeposited inside Cobalt (Co) nanotubes (a new system named Ni @ Co nanorods) were fabricated using a two-step potentiostatic electrodeposition method. Ni @ Co nanorods were crystalline, and they have an average diameter of 150 nm and length of ~15 μm. The X-ray diffraction studies revealed the existence of two separate phases corresponding to Ni and Co. Ni @ Co nanorods exhibited a very high longitudinal coercivity. The general mobility-assisted growth mechanism proposed for the growth of one-dimensional nanostructures inside nano porous alumina during potentiostatic electrodeposition is found to be valid in this case too.
ISSN:1931-7573
1556-276X
1556-276X
DOI:10.1186/1556-276X-5-164