Magnetic and structural properties of electrochemically self-assembled Fe1-xCox nanowires.
Fe1-xCox (0 < or = x < or = 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.
Menon
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Department of Electrical Engineering, Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska 68588-0511, USA.
Bandyopadhyay
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Liu
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Zeng
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H
Sellmyer
D J
DJ
D000537:Aluminum Oxide / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry / Q000302:isolation & purification; D003460:Crystallization / Q000379:methods*; D003461:Crystallography / Q000379:methods; D004563:Electrochemistry / Q000379:methods*; D005296:Ferrous Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000302:isolation & purification; D046911:Macromolecular Substances; D008280:Magnetics; D008422:Materials Testing / Q000379:methods; D018625:Microscopy, Atomic Force; D008968:Molecular Conformation; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D016062:Porosity; D013499:Surface Properties; D014961:X-Ray Diffraction
D005296:Ferrous Compounds; D046911:Macromolecular Substances; C007717:ferrocobalt; D003035:Cobalt; D000537:Aluminum Oxide