In the Kubo formalism, a gigantic magnetoresistance (GMR) for two thin layers of ferromagnetic metals is calculated. The accounting for the equivalence of "vertex correction" and the effective electric field is proved. It is shown that the structure resistance consists of three addends: resistance due to bulk scattering and contact resistance at the metal—metal and metal—reservoir boundaries. It was found that the contact resistance depends essentially on the current-carrier spin and makes a noticeable contribution to the GMR.
Department of Magnetism, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
Science News of the Faculty of Physics, Lomonosov Moscow State University
This new information publication, which is intended to convey to the staff, students and graduate students, faculty colleagues and partners of the main achievements of scientists and scientific information on the events in the life of university physicists.