Photoemission study of electronic structure of the half-metallic ferromagnet Co3 Sn2 S2

Abstract

Surface electronic structure of polycrystalline and single-crystalline samples of the half-metallic ferromagnet Co3 Sn2 S2 was studied by means of angle-resolved and core-level photoemissions. The experiments were performed in temperature regimes both above and below a Curie temperature of 176.9 K. The spectroscopic results are compared to local-spin density approximation band-structure calculations for the bulk samples. It is found that the surface sensitive experimental data are generally reproduced by the bulk computation suggesting that the theoretically predicted half-metallic properties of Co3 Sn2 S2 are retained at the surface. © 2009 The American Physical Society.