Structure and magnetic properties of Co nanowires electrodeposited into the pores of anodic alumina membranes |
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Authors: | Iwona Dobosz Wanda Gumowska Maciej Czapkiewicz |
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Institution: | 1. Faculty of Non-Ferrous Metals, AGH University of Science and Technology, 30 Ave Mickiewicza, 30-059, Cracow, Poland 2. Faculty of Computer Science, Electronics and Telecommunications, AGH University of Science and Technology, 30 Ave Mickiewicza, 30-059, Cracow, Poland
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Abstract: | Cobalt nanowires were obtained in the process of electrodeposition into pores of an alumina membrane. Structural research (XRD, TEM) of Co revealed the face-centered cubic structure. However, the existence of the hexagonal structure cannot be excluded due to strong texture. The influences of an external magnetic field and Al2O3 membrane geometry on magnetic properties of obtained wires were examined. It was found that cobalt nanowires exhibit pronounced shape anisotropy in a direction parallel to the wire axis. The highest influence on the magnetic properties is ascribed to the nanowires geometry i.e., height, diameter, and distances between single wires. Application of an external magnetic field in a perpendicular direction to the sample surface during cobalt electrodeposition increases magnetic anisotropy with a privileged direction along the wire axis. Application of the magnetic field in a parallel direction to the sample surface changes the direction of magnetization. |
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