Growth of Cobalt Nanowires under External Magnetic Field

Abstract:

Metallic cobalt (Co) nanowires with a mean diameter of about 240 nm and lengths up to 30 μm are grown in solution by electroless deposition under external magnetic. Without magnetic field, only quasi-spherical Co nanoparticles are formed. In the presence of the magnetic field, strong attractive dipolar interactions are induced among the Co nanoparticles. This results in the preferential assembly of Co nanoparticles into nanowires with wire axes parallel to the magnetic field direction. Stronger magnetic field intensity produces longer and thinner Co nanowires. The Co nanowires exhibit ferromagnetic properties at room temperature with an enhanced coercivity of 800 Oe due to shape anisotropy.

• Periodical: Advanced Materials Research (Volume 911)
• Pages: 136-140
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.911.136
• Online since: March 2014
• Authors: Mary Donnabelle Balela*, Shunsuke Yagi, Eiichiro Matsubara
• Keywords: Cobalt Nanowires, Electroless Deposition, Magnetic Field

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DOI: 10.1070/rc2005v074n06abeh000897