Optical and magneto-optical spectroscopy of thin ferromagnetic InMnAs layers

Abstract

Spectral dependences of the refractive n(hν) and absorption k(hν) indices (hν= 1.2–4.4 eV) and the magneto-optical constant δ(hν) (hν = 0.5–4.4 eV) of the transverse Kerr effect of the InMnAs layers produced by laser deposition have been studied. The spectra of the diagonal ɛ(hν) and off-diagonal ɛ′hν) components of the permittivity tensor of the layers have been found. A comparison of the spectral dependences δ(hν), ɛ′(hν) and ɛ′2 × (hν)2 of the InMnAs and MnAs layers have been performed. Features in the spectra of the InMnAs layers have been attributed to a competition between the contributions of the In1 − x Mn x As matrix and MnAs inclusions.