The 2-ML (monolayer) oscillation period has been observed in the magne
tization as well as in the magnetoresistance of Fe/Cr/Fe trilayers. Ke
n effect measurements were performed in order to verify the periodicit
y and determine the kind of the coupling between the Fe layers. The ma
gnetoresistance loops show characteristic steps at magnetic field valu
es at which the size of the magnetization changes.