Related Experiment Video
Updated: May 12, 2026

Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization
Published on: October 6, 2019
Magnetic properties of cylindrical diameter modulated Ni80Fe20 nanowires: interaction and coercive fields
Mohamed Shaker Salem1, Philip Sergelius, Rosa M Corona
1Physics Department, Faculty of Science, Cairo University, 12613 Giza, Egypt.
Abstract:
Magnetic properties of cylindrical Ni80Fe20 nanowires with modulated diameters are investigated theoretically as a function of their geometrical parameters and compared with those produced inside the pores of anodic alumina membranes by pulsed electrodeposition. We observe that the Ni80Fe20 nanowires with modulated diameters reverse their magnetization via the nucleation and propagation of a vortex domain wall. The system begins generating vortex domains in the nanowire ends and in the transition region between the two segments to minimize magnetostatic energy generated by surfaces perpendicular to the initial magnetization of the sample. Besides, we observed an increase of the coercivity for the sample with equal volumes in relation to the sample with equal lengths. Finally, the interaction field is stronger in the case of constant volume segments. These structures could be used to control the motions of magnetic domain walls. In this way, these nanowires with modulated diameters can be an alternative to store information or even perform logic functions.
Related Concept Videos
Ferromagnetism
Magnetic Field Due To A Thin Straight Wire
Magnetic Field Due to Two Straight Wires
Magnetic Force On Current-Carrying Wires: Example
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current
Magnetic Force On A Current-Carrying Conductor
Consider a compass placed near a current-carrying wire. The wire experiences a force that aligns the needle of the compass tangentially around the wire. Thus, the current-carrying wire produces concentric circular loops of magnetic field. The magnetic field generated by a wire can be...

