Prediction of large polar Kerr rotation in the Heusler-related alloys AuMnSb and AuMnSn

Offernes, Laila; Ravindran, P.; Kjekshus, A.
April 2003
Applied Physics Letters;4/28/2003, Vol. 82 Issue 17, p2862
Academic Journal
Theoretical spectra for the magneto-optical Kerr effect have been obtained for the Heusler-related alloys AuMnSb and AuMnSn, and repeated calculations are performed for the isostructural PtMnSb phase. Using experimental lattice constants, our calculations predict a Kerr rotation exceeding -1° in the 0.5-0.8 eV region for AuMnSb and a somewhat smaller rotation for AuMnSn. Supercell calculations indicate that half-metallic behavior can be induced on hole/electron doping in the AuMnSn[SUB1-x]Sb[SUBx] solid-solution phase for 0.50


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