Berlin 2008 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 19: Spin Dynamics / Spin Torque I
MA 19.17: Vortrag
Mittwoch, 27. Februar 2008, 18:15–18:30, EB 301
Adjusting ferromagnetic precessional modes in magnetic thin film structures — •Jeffrey McCord1, Rainer Kaltofen1, Manfred Wolf1, Ingolf Mönch1, Eckhardt Quandt2, Rudolf Schäfer1, and Ludwig Schultz1 — 1IFW Dresden — 2CAU Kiel
By controlled adjustment of the magnetic ground state in square ferromagnetic elements a coupled micromagnetic system with coupled precessional oscillations is generated. The occurrence of the coupled system is associated with domain branching at the element's edges. Dynamic mode-to-mode energy transfer results in a precessional decay time exceeding the natural ferromagnetic material's relaxation time. This reduction in the effective magnetic damping parameter is in contradiction to the consensus that magnetic domain formation leads to a decrease in precessional relaxation time.