Characterization of electrodeposited Ni and Ni80Fe20 nanowires |
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Authors: | DC Leitao CT Sousa J Ventura JS Amaral F Carpinteiro KR Pirota M Vazquez JB Sousa JP Araujo |
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Institution: | 1. IN and IFIMUP, Institute of Nanoscience and Nanotechnology, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal;2. CICECO, Universidade de Aveiro, Portugal;3. Instituto de Ciencia de Materiales de Madrid, CSIC, 28049 Madrid, Spain |
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Abstract: | In this work we use nanoporous alumina substrates as templates for the growth of Ni and Ni80Fe20 nanowires. Our membranes were obtained by a two-step anodization process of high-purity aluminum foils: first anodizations were performed at 40 V for 15 h in 0.3 M oxalic acid, at 2–6 °C; the second anodization was carried out using the same conditions for 30 min, resulting in pore lengths of ~1.3 μm. After the second anodization, the pore bottom barrier-layer was thinned, to allow the current to flow through electron tunneling. A pulsed electrodeposition method was then used to grow Ni and Ni80Fe20 nanowires. Transport characterization and isothermal magnetization measurements performed on the produced arrays are presented. |
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