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Magnetic and Structural Properties of Electrochemically Self-Assembled Fe1−xCox Nanowires

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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.
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Keywords: FECO ALLOYS; MAGNETIC PROPERTIES; NANOWIRES; POROUS ALUMINA; SELF-ASSEMBLY

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: 2001-06-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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