title: Co dimers observed by extended x-ray absorption fine structure spectroscopy.
abstract: Cobalt was introduced into a silver matrix by ion implantation and observed by extended x-ray absorption fine structure (EXAFS) spectroscopy. In the range 0.10--0.70 at. % evidence of Co dimers dispersed in the matrix was found. The dimers are somewhat contracted with respect to the bulk Co nearest neighbor distance and distributed in a chainlike configuration with each dimer at 90 degrees from each other along opposite square faces of the Ag fcc lattice.
authors.affiliation: Dipartimento di Fisica--Universitá di Catania, Istituto Nazionale di Fisica della Materia, Corso Italia 57, 95129 Catania, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Faraci
authors.forename: A R
authors.initials: AR
authors.lastname: Pennisi
authors.forename: A
authors.initials: A
authors.lastname: Balerna
authors.forename: H
authors.initials: H
authors.lastname: Pattyn
authors.forename: G E
authors.initials: GE
authors.lastname: Koops
authors.forename: G
authors.initials: G
authors.lastname: Zhang