Open Access Nano Express

Well-aligned Nickel Nanochains Synthesized by a Template-free Route

Pengwei Li1, Rongming Wang1*, Weimeng Chen2, Chinping Chen2*, Xingyu Gao3 and ATS Wee3

Author affiliations

1 Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education) and Department of Physics, Beijing University of Aeronautics and Astronautics, 100191, Beijing, People’s Republic of China

2 Department of Physics, Peking University, 100871, Beijing, People’s Republic of China

3 Departments of Physics, National University of Singapore, Singapore, 117542, Republic of Singapore

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Citation and License

Nanoscale Research Letters 2009, 5:597-602  doi:10.1007/s11671-009-9512-6

Published: 25 December 2009

Abstract

Highly uniform and well-aligned one-dimensional Ni nanochains with controllable diameters, including 33, 78, and 120 nm, have been synthesized by applying an external magnetic field without any surface modifying agent. The formation can be explained by the interactions of magnetic dipoles in the presence of applied magnetic field. Magnetic measurements demonstrate that the shape anisotropy dominates the magnetic anisotropy. The demagnetization factor, ∆N, is in the range of 0.23–0.36.

Keywords:
Ni nanostructure; Magnetic anisotropy; X-ray absorption spectroscopy; Electron microscopy