Fabrication and magnetic properties of ordered 20 nm Co–Pb nanowire arrays

• Published in: Solid state communications Vol. 130; no. 8; pp. 541 - 545
• Main Authors: Ji, G.B., Chen, W., Tang, S.L., Gu, B.X., Li, Z., Du, Y.W.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.05.2004; Elsevier
• Subjects: A. Co–Pb nanowire arrays; B. Magnetic recording materials; Condensed matter: electronic structure, electrical, magnetic, and optical properties; D. AAO template; Exact sciences and technology; Magnetic properties and materials; Physics; Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.); Studies of specific magnetic materials; B. Magnetic recording materials; 75.50.Ss; A. Co–Pb nanowire arrays; 75.60.Nt; D. AAO template; 82.45.Qr; Annealing; Inorganic compounds; Magnetic ordering; Polycrystals; XRD; Nanostructures; 82.45.Qr A. Co-Pb nanowire arrays; Transmission electron microscopy; Phase separation; Coercive force; Electrodeposition; Recording material; Magnetic materials; Nanowires; Aluminium oxides; Magnetic properties
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/j.ssc.2004.03.013

Ordered Co–Pb nanowire arrays embedded in anodic alumina template were successfully fabricated by electrodeposition. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) observations revealed that the Co–Pb nanowires were polycrystalline with uniform diameters around 20 nm and lengths up to several micrometers. Magnetic measurements showed that the coercivity and remanence of the as-deposited Co–Pb nanowires decreased with the increase of the Pb content. After annealing the Co–Pb nanowires present higher coercivities (2.4–2.5 kOe) than that of pure Co nanowires (2.1 kOe) and the dependence of coercivity and remanence on the Pb content is inconspicuous. A phase separation of Co and Pb occurred after annealing. The familiar pinning model was employed to explain the above experimental results.