Fig. 2
From: Strongly coupled magnon–phonon dynamics in a single nanomagnet
Avoided crossings and fits. Close-ups of the Fourier amplitude spectra exhibiting anti-crossings for the (a) (1,1) and (b) (2,0) modes. The amplitudes are normalized within each figure. Next to each colormap are the Fourier spectra obtained from the TR-MOKE time trace for the range of applied fields selected by the dotted gray box in the colormap. The two peaks are indicated by the red arrows. The inset in (a) is the boxed region Fourier transformed over a longer time length to display the two modes more clearly. c Simultaneous fits (solid red lines) of Eq. (3) to the frequencies of the (1,1) and (d) (2,0) modes. The error in the frequencies is the FFT resolution obtained from the time duration of each frequency component in the signal. e Mode splitting energy of the (1,1) and (2,0) crossings
