title: Multiple scattering approach to K-edge XANES of Sb-Te systems.
abstract: The Sb-Te systems are important for optical memories. The local structures of these Sb-Te systems are crucial to understand the properties. Here we study three different Sb-Te systems, Sb2Te3, c- and a-SbTe (c; crystalline, a; amorphous) by use of XANES analyses. The present calculations for Sb2Te3 system show quite good agreement with the observed spectra. In contrast to Sb2Te3 system, both c- and a-SbTe systems, in which a ratio of Sb to Te is 3, are metastable; both of the structures have not been known yet. We thus investigate these local structures by use of the multiple scattering approach, and propose a possible model for each of c- and a-SbTe.
authors.affiliation: Graduate School for Science, Chiba University, Inage, Japan. kuniko@scichem.s.chiba-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Hayakawa
authors.forename: T
authors.initials: T
authors.lastname: Fujikawa
authors.forename: N
authors.initials: N
authors.lastname: Yiwata
authors.forename: K
authors.initials: K
authors.lastname: Tani