Abstract
We report on the dynamic properties of mesoscopic magnetic objects. Such objects have dimensions somewhat larger than the magnetic exchange length ΞΎ. This leads to relatively simple and stable patterns of the magnetization, which can be excited using magnetic field pulses. The subsequent dynamics can be studied using X-ray-based magnetic microscopy. We show examples of high symmetry structures where the dynamics is relatively simple and can be analyzed quantitatively in terms of amplitude, frequency, damping, and symmetry.Intentional defects allow modifying specific modes. When using high amplitude excitations, the magnetization in such structures can be switched.
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Acknowledgements
It is our pleasure to thank C.H. Back, M. Buess, J. Stahl, I. MΓΆnch, R. Mattheis, L. Bischoff, J. Fassbender, and F. Nolting who contributed to the progress of this work at various stages for data analysis, for sample preparation, and for developing the instrumentation. Part of this work was performed at the Swiss Light Source, Paul Scherrer Institute, Switzerland.
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Quitmann, C., Raabe, J., Puzic, A., Kuepper, K., Wintz, S. (2010). Dynamics of Mesoscopic Magnetic Objects. In: Beaurepaire, E., Bulou, H., Scheurer, F., Jean-Paul, K. (eds) Magnetism and Synchrotron Radiation. Springer Proceedings in Physics, vol 133. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04498-4_14
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DOI: https://doi.org/10.1007/978-3-642-04498-4_14
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