Negative Domain Wall Resistance in Ferromagnets
R. P. van Gorkom, Arne Brataas, and Gerrit E. W. Bauer
TL;DR
This paper presents a theoretical study of electrical resistance in ferromagnets with domain walls, revealing conditions under which the resistance can be negative or positive, with implications for experimental transport measurements.
Contribution
It introduces a theoretical model that predicts the sign of domain wall resistance based on spin-dependent scattering times in ferromagnets.
Findings
Domain wall resistance can be negative or positive.
Resistance sign depends on spin-dependent scattering life-times.
Predictions are testable through experimental transport studies.
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.
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