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.
Highlights
Progress in miniaturization of electronic elements accompanied by a need for their higher and higher efficiency affects the development of the studies in the informatics technology
Nanowires are applied in production of magnetic information carriers [1, 2], biomedical materials, sound sensors and gas detectors [3,4,5], as well as diodes and transistors in electronics [6]
The results show that the cobalt deposition was preceded by hydrogen evolution on the Au electrode
Summary
Progress in miniaturization of electronic elements accompanied by a need for their higher and higher efficiency affects the development of the studies in the informatics technology. M. Czapkiewicz Faculty of Computer Science, Electronics and Telecommunications, AGH University of Science and Technology, 30 Ave Mickiewicza, 30-059 Cracow, Poland. Nanostructural magnetic materials are used in informatics technologies and data storing, and in many other areas like medicine, motorization, environment protection, sensors, and catalysis technology. Nanowires are applied in production of magnetic information carriers [1, 2], biomedical materials, sound sensors and gas detectors [3,4,5], as well as diodes and transistors in electronics [6]
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