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Micromagnetic properties and magnetization switching of single domain Co dots studied by magnetic force microscopy |
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| Authors: | M Löhndorf A Wadas G Lütjering D Weiss R Wiesendanger |
| Institution: | 11. Institute of Applied Physics and Microstructure Research Center, University of Hamburg, Jungiusstrasse 11, D-20355, Hamburg, Germany 21. Max-Planck-Institut für Festk?rperforschung, P.O. Box 800665, D-70506, Stuttgart, Germany 31. Institut für Experimentelle und Angewandte Physik, Universit?t Regensburg, D-93040, Regensburg, Germany |
| Abstract: | Magnetic force microscopy was applied to study the magnetic properties of Co dot microstructures. The high density magnetic dot arrays were fabricated using nanolithographic techniques on GaAs substrates. The ferromagnetic Co dots were found to be in a single domain state for Co film thicknesses of 7 nm and 17 nm. The magnetization of the as-prepared Co dot array was found to be in a non-uniform state. After applying a magnetic field the Co dots are in a uniform magnetization state. Induced switching of the magnetization of single Co dots by the stray field of the probing tip using an additionally applied in-situ magnetic field has been demonstrated. |
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