The magnetooptical Kerr rotation angle θK for the polished surfaces of bulk PtMnSb samples was measured at 632.8 nm in strong magnetic fields. The saturation value of θK for the stoichiometric sample was 1.42° in the as-polished state, and was improved to 1.75° by annealing at temperatures higher than 400°C. It is suggested that the improvement in θK is caused by the decrease in the imaginary part of the diagonal elements of the dielectric constant tensor. It was also found that θK depends strongly on the composition in the Pt-Mn-Sb ternary system, and takes a maximum at the stoichiometric composition.
ASJC Scopus subject areas
- Engineering (miscellaneous)