Perpendicular transport and magnetization processes in magnetic multilayers with strongly and weakly coupled magnetic layers

摘要

Within the framework of a two-band tight-binding model, we have performedcalculations of giant magnetoresistance, exchange coupling and thermoelectricpower (TEP) for a system consisting of three magnetic layers separated by twonon-magnetic spacers with the first two magnetic layers stronglyantiferromagnetically exchange-coupled. We have shown how does the GMR relatewith the corresponding regions of magnetic structure phase diagrams andcomputed some relevant hysteresis loops, too. The GMR may take negative valuesfor specific layers thicknesses, and the TEP reveals quite pronouncedoscillations around a negative bias.