Fig. 3

Magnetic anisotropy determined from magnetization dynamics measurements. a Precessional dynamics from all-optical pump-probe experiments recorded for a CoFeB thin film, by rotating the μ₀H = 6.8 mT in the film plane in steps of 5°. The precession amplitude is coded from negative deflection (blue) to positive deflection (red). b The precession frequencies extracted by FFT (different color code for a better distinction). The magnetic hard and easy axes are marked by the dashed black lines. The precession frequency increases towards the magnetic easy axis and declines towards the magnetic hard axis