Figure 4
From: Resonant amplification of vortex-core oscillations by coherent magnetic-field pulses
Force-balance relation in vortex oscillation.
(a, b) The second row presents the strengths of the individual force terms, that is, the gyroforce FG, the Zeeman forces FH, the restoring force FW and the damping forces FD, according to the applied Gaussian-pulse fields shown in the first row. The bottom row shows the orientations of the individual force terms, that is, the angles θ with respect to the vortex-core-position vector (X), as defined in (c). (d) Schematic illustration of orientation and strength of employed forces under resonant amplification (left) and forced damping (right), where for simplification, damping force FD is not shown. v corresponds to the core motion velocity vector. The red dot indicates the core position.
