Effect of length on the magnetic properties of Ni 300 nm wide nanowires |
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| Institution: | 1. National Research Centre “Kurchatov Institute”, B. P. Konstantinov Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia;2. Institute of Polymer Materials, Department of Materials Science, Friedrich-Alexander University Erlangen-Nürnberg, Martensstrasse 7, D-91058 Erlangen, Germany;3. European Synchrotron Radiation Facility, 71, Avenue des Martyrs, CS40220, F-38043 Grenoble Cedex 9, France;4. Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden |
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| Abstract: | The Ni 300 nm wide nanowires were fabricated inside the as-synthesized nanochannels of anodic aluminum oxide (AAO) template by electrochemical deposition method. The angular dependence of coercivity and remanence of Ni nanowire arrays with various lengths have been comparatively studied. Investigation results demonstrate that the easy axis is along the wire axis for the longer nanowires of 4 μm or 9 μm in length due to their large shape anisotropy. However, the magnetostatic coupling is dominant for the shorter nanowires of 0.9 μm in length resulting in the change of magnetization behaviors, including coercivity and easy axis. A further explanation was also given by simple calculation in the paper. |
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