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arXiv · 0809.4649

Domain wall displacement in Py square ring for single nanometric magnetic bead detection

P. Vavassori·V. Metlushko·M. Gobbi·M. Donolato·M. Cantoni·R. Bertacco
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Abstract

A new approach based on the domain wall displacement in confined ferromagnetic nanostructures for attracting and sensing a single nanometric magnetic particles is presented. We modeled and experimentally demonstrated the viability of the approach using an anisotropic magnetoresistance device made by a micron-size square ring of Permalloy designed for application in magnetic storage. This detection concept can be suitable to biomolecular recognition, and in particular to single molecule detection.

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P. Vavassori, V. Metlushko, M. Gobbi, M. Donolato, M. Cantoni, R. Bertacco. 2008-09-26. Domain wall displacement in Py square ring for single nanometric magnetic bead detection. https://doi.org/10.1063/1.3030984

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