Co dimers observed by extended x-ray absorption fine structure spectroscopy. 2001

G Faraci, and A R Pennisi, and A Balerna, and H Pattyn, and G E Koops, and G Zhang
Dipartimento di Fisica--Universitá di Catania, Istituto Nazionale di Fisica della Materia, Corso Italia 57, 95129 Catania, Italy.

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.

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