Dynamic cantilever magnetometry of individual CoFeB nanotubes

Gross, B. and Weber, D. P. and Rüffer, D. and Buchter, A. and Heimbach, F. and Fontcuberta i Morral, A. and Grundler, D. and Poggio, M.. (2016) Dynamic cantilever magnetometry of individual CoFeB nanotubes. Physical Review B, 93 (6). 064409.

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Official URL: http://edoc.unibas.ch/41692/

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We investigate single CoFeB nanotubes with hexagonal cross section using dynamic cantilever magnetometry (DCM). We develop both an analytical model based on the Stoner-Wohlfarth approximation and a broadly applicable numerical framework for analyzing DCM measurements of magnetic nanostructures. Magnetometry data taken at 4.2 K show the presence of a uniformly magnetized configuration at high external fields with mu M-0(s) = 1.3 +/- 0.1 T and nonuniform configurations at low fields. In this low-field regime, comparison between numerical simulations and DCM measurements supports the existence of flux-closure configurations. Crucially, evidence of such configurations is only apparent because of the sensitivity of DCM to single nanotubes, whereas conventional measurements of ensembles are often obscured by sample-to-sample inhomogeneities in size, shape, and orientation.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanotechnologie Argovia (Poggio)
UniBasel Contributors:Poggio, Martino and Gross, Boris André and Weber, Dennis Patrick and Buchter, Arne
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:27 Jul 2018 13:15
Deposited On:25 Apr 2016 13:48

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