Michael Martens
Broschiertes Buch

Dynamics of magnetic vortices and antivortices studied by ferromagnetic absorption spectroscopy and transmission x-ray microscopy

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Magnetic singularities in micron-sized ferromagnetic elements have been proposed for new concepts of magnetic data storage and are an ideal model system for the investigation of magnetization dynamics. This thesis deals with the dynamics of magnetic vortices as well as antivortices at picosecond and nanosecond timescales. High frequency alternating fields and spin-polarized currents are used for the manipulation of the vortices¿ magnetic states. The special case of rotational excitation is investigated by time-resolved magnetic transmission x-ray microscopy, micromagnetic simulations, and ana...