We report parametric excitation of magnetic precession modes in nanodisks using a parallel pumping configuration. The excitations are detected using a ferromagneitc resonance force microscopy method, and the parallel-pumped spectra reveal nonlinear characteristics including instability thresholds and multiple, narrow, saw-tooth-shaped resonances. These characteristics are in accord with analytical theory and micromagnetic modeling results. Modeled mode profiles of the excitations show that higher order standing spin-wave modes with both even and odd symmetries are excited under parallel pumping.
Citation: Physical Review B
Pub Type: Journals
parametric pumping, parallel pumping, spin waves, ferromagnetic resonance (FMR), micromagnetic modeling, ferromagnetic resonance force microscopy (FMRFM), nanomagnetics