Electronic structure of substitutional Mn in epitaxial In 0.965 Mn 0.035 Sb film

The magnetic and electronic structure of Mn in In 0.965 Mn 0.035 Sb ferromagnetic semiconductor thin film was studied by x-ray absorption spectroscopy and x-ray magnetic circular dichroism. Comparison with atomic multiplet calculations suggests that manganese substitutes on sites with tetrahedral symmetry. Strong magnetic dichroism was observed from 5 to 300 K, at an applied field of 2 T. The temperature dependence of dichroism indicates presence of two magnetic Mn species having very similar spectral features. A high temperature species dominates the dichroic response over 50-300 K and a low temperature species is observed below 50 K.