XAFS OF MN MULTILAYERS ON RU(001)

Mn K-edge XAFS together with LEED and thermal desorption has been used to investigate a series of Mn multilayers deposited on a Ru(001) subs trate under UHV conditions. It is found that a meta-stable phase with a (1 x 1) LEED pattern can be prepared at thin as well as thick layers . The XAFS of such a system appears to exhibit an intense HCP-like EXA FS pattern indicating that the as-deposited Mn overlayer is pseudomorp hic with the substrate. Upon annealing, the XAFS of the meta-stable ph ase collapses to a pattern similar to that of the bulk Mn.