Magnetic and Structural Properties of Electrochemically Self-Assembled Fe1−xCox Nanowires
Abstract:Fe1−xCox (0 ≤ x ≤ 1) nanowires have been self-assembled by electrodeposition in porous alumina films. The crystal structure is bee at the Fe end. With increased addition of Co, the crystal structure remains bcc until about 67% addition of Co. At the Co end, the structure is a mixture of hcp and fcc. Magnetic studies show very high coercivities for the Fe-Co alloys in the bcc phase. For Fe0.67Co0.33 nanowires of diameter 9 nm, the coercivity is about 2900 Oe, whereas for Fe0.33Co0.67 nanowires, it is about 2850 Oe. Temperature and size dependence of magnetic properties show no indication of superparamagnetic effects down to wire diameters of 9 nm.
Document Type: Research Article
Affiliations: 1: a Department of Electrical Engineering and Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska, 68588-0511, USA 2: b Department of Mechanical Engineering and Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska, 68588-0511, USA 3: c Department of Physics and Astronomy and Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska, 68588-0113, USA
Publication date: June 1, 2001
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