Fabrication and magnetic properties of highly ordered Co16Ag84 alloy nanowire array |
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| Authors: | Y.W. Wang G.Z. Wang S.X. Wang T. Gao H. Sang L.D. Zhang |
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| Affiliation: | (1) Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei 230031, P.R. China, CN;(2) National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P.R. China, CN |
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| Abstract: | Highly ordered Co-Ag alloy nanowire arrays embedded in the nanochannels of anodic alumina membranes (AAMs) were successfully fabricated using electrodeposition. Scanning electron microscopy and transmission electron microscopy observations revealed that the ordered Co-Ag alloy nanowires were uniformly assembled into the hexagonally ordered nanochannels of the AAMs. Magnetic measurements showed that the perpendicular coercivity (Hc⊥) of the ordered nanowire arrays increased dramatically as the annealing temperature (Ta) rose from 300 °C, reached its maximum (183 Oe) at 400 °C and then decreased sharply as Ta further increased beyond 400 °C. However, there was little change in the parallel coercivity (Hc∥) of the nanowire arrays during the annealing process. The mechanism of this phenomenon was attributed to the special structure of the AAMs and nanowires. Received: 27 November 2000 / Accepted: 3 May 2001 / Published online: 25 July 2001 |
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| Keywords: | PACS: 75.30.Gw 73.61.Tm |
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