Giant magnetoresistance in hybrid superconductor/ferromagnetic sandwich heterostructuresстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The perpendicular electron transport through a ferromagnetic bilayer (F-1/F-2) in contact with a superconductor (S) was investigated theoretically. The conductance is calculated in the Kubo formalism with Green functions found as the solutions of the Gorkov equations. It is shown that the giant magnetoresistance (GMR) defined as the relative difference in conductivity between the parallel and antiparallel alignments of the magnetizations in Fl and Fz behaves differently in the ballistic and diffusive regimes. In the former case, the GMR amplitude can be fairly large, whereas in the latter case, it almost vanishes, The interpretation of this behaviour is given by comparing the contributions to the total resistance of the Andreev reflection at the F-1/S interface and the usual quantum reflection at the F-1/F-2 interface.