3 research outputs found
Second Report on Reform of the Commission. Analysis of current practice and proposals for tackling mismanagement, irregularities and fraud. Committee of Independent Experts. Volume I, 10 September 1999
Get PDFMagnetic Antivortices
No full textWe investigate the dynamics of magnetic antivortices by time-resolved magnetic X-ray microscopy and high-frequency absorption spectroscopy. A method for the reliable generation of isolated magnetic antivortices is devised using specifically formed microstructures and two-dimensional sequences of magnetic fields. For antivortices the measured resonance frequency is lower than for comparable vortices. The deflection of antivortices by external fields reveals strong deviations from a harmonic potential as well as rather low annihilation fields. Spectroscopy yields a characteristic absorption signal for antivortices for strong excitation that indicates a continuous switching of the antivortex core
