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Schematic illustration of in- and out-of-phase magnetization oscillations shown, respectively, as black and grey arrows on precession cones for various Amperian and external field directions and magnitude. The rectangles represent the two magnetic layers in cross section. For (a) and (b) , while in (c) and (d) . The probe laser beam is incident from the left and directions of indicated by ⊗ and ◉ while .
Solid lines represent calculated switching strength parameter as a function of for various values of . An experimental point is hollow (filled) if spectra correspond to antiparallel (parallel) alignment of magnetization is detected.
(a) Coupled pendulums with different local gravitational fields and . (b) and (c) illustrate dependence of normalized eigenvector elements and on for the lower- and higher- frequency normal modes.
Anti-Stokes Brillouin spectra recorded in Sample No. 2 for various values of and . The numbers beside each peak indicate the peak intensity (subtracted from background). All spectra are recorded with light incident on same magnetic layer.
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