Veranstaltungsdetails

9.11.2006, 15:30
Jungiusstr. 11, Hörsaal AP

SFB 668 - Seminar

Jan Podbielski (Universität Hamburg):

Spin-Wave Interference in Microscopic Rings

We have studied the spin excitations of ferromagnetic rings and observed a distinct series of quantized modes in the vortex state. We attribute them to spin waves that circulate around the ring and interfere constructively. They form azimuthal eigenmodes of a magnetic ring resonator. The eigenfrequencies are calculated semianalytically and classified as a function of magnetic field by a quantization rule which takes into account a periodic boundary condition.