Well-aligned Nickel Nanochains Synthesized by a Template-free Route
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
Nanoscale Research Letters 2009, 5:597-602 doi:10.1007/s11671-009-9512-6Published: 25 December 2009
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.