Influence of the magnetic moment of the probe of a magnetic resonance force microscope on the spin-wave resonance spectra

The ferromagnetic resonance in an array of permalloy microstrips 3000 $\times$ 500 $\times$ 30 nm$^3$ in size, which are ordered on a rectangular 3.5 $\times$ 6 $\mu$m$^2$ lattice, is studied using magnetic resonance force microscopy with strong probe–sample interaction. This interaction induces intricate modifications of the observed spectra, which are manifested both in line splitting and in changes in shape. The dependences of the observed spectra on the sample–probe distance and the orientation of the magnetic moment of the probe are analyzed.