AB-INITIO CALCULATED MAGNETOOPTICAL SPECTRA OF HALF-METALLIC FERROMAGNETS

Within the density-functional theory approach we have carried out full y relativistic calculations of the conductivity tenser, the Kerr rotat ion and ellipticity for PtMnSb, PdMnSb and NiMnSb compounds. Our calcu lations successfully reproduced the huge Kerr effect for PtMnSb and gi ve the correct positions of the main features for the other compounds. The origins of the main peculiarities are discussed.