Observation of end-vortex nucleation in individual ferromagnetic nanotubes

Mehlin, A. and Gross, B. and Wyss, M. and Schefer, T. and Tütüncüoglu, G. and Heimbach, F. and Fontcuberta i Morral, A. and Grundler, D. and Poggio, M.. (2018) Observation of end-vortex nucleation in individual ferromagnetic nanotubes. Physical Review B, 97 (13). p. 134422.

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Official URL: https://edoc.unibas.ch/63545/

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The reversal of uniform axial magnetization in a ferromagnetic nanotube (FNT) has been predicted to occur through the nucleation and propagation of vortex domains forming at the ends. We provide experimental evidence for this behavior through dynamic cantilever magnetometry measurements of individual FNTs. In particular, we identify the nucleation of the vortex end domains as a function of applied magnetic field and show that they mark the onset of magnetization reversal. We find that the nucleation field depends sensitively on the angle between the end surface of the FNT and the applied field. Micromagnetic simulations substantiate the experimental results and highlight the importance of the ends in determining the reversal process. The control over end-vortex nucleation enabled by our findings is promising for the production of FNTs with tailored reversal properties.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanotechnologie Argovia (Poggio)
UniBasel Contributors:Mehlin, Andrea and Gross, Boris André and Wyss, Marcus and Schefer, Thomas and Poggio, Martino
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:25 Apr 2018 07:41
Deposited On:25 Apr 2018 07:41

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