Anomalous and Topological Hall Effects in Itinerant Magnets by Yuki Shiomi

By Yuki Shiomi

This publication offers an research of the anomalous and topological corridor results in a few itinerant ferromagnets and helimagnets through measurements of corridor results pushed through electric or warmth present. New clarifications are supplied for spin-dependent corridor results brought on via the Berry section, skew scattering, and scalar spin chirality.

The writer unearths the scattering-free nature of the Berry-phase-induced anomalous corridor present by way of engaging in the 1st comparative learn of electric and thermal corridor results. The impurity-element dependence of the anomalous corridor influence attributable to skew scattering is systematically investigated within the low-resistivity quarter for Fe. new examples displaying a topological corridor impression are present in helimagnets, during which nonzero scalar spin chirality arises from the modulation of spin constitution via Dzyaloshinsky–Moriya (DM) interplay. any such DM-interaction-mediated topological corridor impression is a brand new form of topological corridor impact. additionally the temperature dependence of topological corridor phrases within the thermal corridor impression and Nernst–Ettingshausen influence is located to be different from that during corridor effect.

These effects can be priceless for functions of spin present to units with low energy consumption.

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