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 by means of measurements of corridor results pushed via electric or warmth present. New clarifications are supplied for spin-dependent corridor results brought about via the Berry part, skew scattering, and scalar spin chirality.

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

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

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