Resumen:
We obtain angular-resolved quantitative magneto-optical measurements with good signal-to-noise ratio from very diffusive reflection patterns of industrial steel samples, which are a consequence of their large surface roughness. For the diffuse spots generated by these samples, we observe that while the overall shape of the magnetic hysteresis loop is nearly independent, a monotonous increase of the magneto-optical polarization change occurs as a function of the scattering angle. We demonstrate that this observation can be explained by considering the diffuse spot as a superposition of independent reflections from planar surfaces with varying incidence angles. This main finding can be ultimately used to facilitate an efficient non-invasive analysis of industrial magnetic samples by means of magneto-optical methods despite their elevated level of roughness.
