Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
; Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China
; Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China
Elemental distributions of Fe, Mn, and Co in ultrathin FeMn/Co multilayers have been profiled by the x-ray anomalous scattering technique. Chemical intermixing is observed at the FeMn/Co interfaces with intermixing regions up to 14 Angstrom. The chemical compositions in the intermixing regions are found to vary gradually from FeMn to FeMnCo(2) and from FeMnCo(2) to Co., respectively, but not from FeMn to Co. This result suggests that a reaction may occur and FeMnCo(2) appears at the interface during the deposition. (C) 2002 American Institute of Physics.