Fig. 6: Spin-wave propagation patterns along the rectangle-like domain wall of an elongated skyrmion.
From: Elongated skyrmion as spin torque nano-oscillator and magnonic waveguide

Spatial profiles of the fluctuation in the x component of magnetization δmx excited by a sinusoidal magnetic field h = h0sin\((2\pi ft)\hat{x}\), where h0 and f are the amplitude and the frequency of this excitation field, respectively. In our simulations, h0 = 20 mT, f = 20 GHz, the spatial area of the excitation field is a 4 × 50 nm2 and b 4 × 100 nm2. The color bar denotes the value of the fluctuation in the x component of magnetization δmx.