Negative Domain Wall Resistance in Ferromagnets

Abstract

The electrical resistance of a diffusive ferromagnet with magnetic domain walls is studied theoretically, taking into account the spatial dependence of the magnetization. The semiclassical domain wall resistance is found to be either negative or positive depending on the difference between the spin-dependent scattering life-times. The predictions can be tested experimentally by transport studies in doped ferromagnets.

4 pages, 2 figures, accepted Phys. Rev. Lett

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