Electron-electron interaction effects in magnetic layered structures

We consider some peculiarities of the logarithmic electron-electron interac tion corrections to conductivity, which can arise in magnetic quantum wells due to spin-splitting of energy levels. The matrix elements of Coulomb int eraction include different screening contributions from spin-up and spin-do wn electrons, which can lead to anomalous behavior of the interaction const ant when the width of a spin quantum well is changed. Our results explain q ualitatively the physical origin of the recently observed anomalous behavio r of the logarithmic term in electrical resistivity of Co/Cr/Ag/Co layered structures.