Mossbauer absorption spectroscopy has been applied for Sn-119 micropro
bes located in Cu (or Au) layers of Co/Cu (or Co/An) multilayers. By o
bserving the hyperfine field, it has been confirmed that spin polariza
tion exists in the middle of the spacer layer with thickness of 20 Ang
strom. The hyperfine field is significantly larger in Au than in Cu.