Nano Research

, Volume 1, Issue 6, pp 465–473

On the growth mechanism of nickel and cobalt nanowires and comparison of their magnetic properties

Open AccessResearch Article

DOI: 10.1007/s12274-008-8049-9

Cite this article as:
Narayanan, T.N., Shaijumon, M.M., Ci, L. et al. Nano Res. (2008) 1: 465. doi:10.1007/s12274-008-8049-9

Abstract

Magnetic nanowires (NWs) are ideal materials for the fabrication of various multifunctional nanostructures which can be manipulated by an external magnetic field. Highly crystalline and textured nanowires of nickel (Ni NWs) and cobalt (Co NWs) with high aspect ratio (∼330) and high coercivity have been synthesized by electrodeposition using nickel sulphate hexahydrate (NiSO4·6H2O) and cobalt sulphate heptahydrate (CoSO4·7H2O) respectively on nanoporous alumina membranes. They exhibit a preferential growth along 〈110〉. A general mobility assisted growth mechanism for the formation of Ni and Co NWs is proposed. The role of the hydration layer on the resulting one-dimensional geometry in the case of potentiostatic electrodeposition is verified. A very high interwire interaction resulting from magnetostatic dipolar interactions between the nanowires is observed. An unusual low-temperature magnetisation switching for field parallel to the wire axis is evident from the peculiar high field M(T) curve.

https://static-content.springer.com/image/art%3A10.1007%2Fs12274-008-8049-9/MediaObjects/12274_2008_8049_Fig1_HTML.jpg

Keywords

Magnetic nanowiresmobility assisted growthmagnetostatic interactionelectrodepositionmagnetisation switching
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Copyright information

© Tsinghua Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  1. 1.Department of PhysicsCochin University of Science & TechnologyKeralaIndia
  2. 2.Department of Mechanical Engineering & Materials ScienceRice UniversityHoustonUSA