Anomalous and Topological Hall Effects in Itinerant Magnets

  • Yuki Shiomi

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xii
  2. Yuki Shiomi
    Pages 1-23
  3. Yuki Shiomi
    Pages 87-89

About this book

Introduction

This book presents an investigation of the anomalous and topological Hall effects in some itinerant ferromagnets and helimagnets by measurements of Hall effects driven by electrical or heat current. New clarifications are provided for spin-dependent Hall effects induced by the Berry phase, skew scattering, and scalar spin chirality.

The author reveals the scattering-free nature of the Berry-phase-induced anomalous Hall current by conducting the first comparative study of electrical and thermal Hall effects. The impurity-element dependence of the anomalous Hall effect caused by skew scattering is systematically investigated in the low-resistivity region for Fe. Two new examples showing a topological Hall effect are found in helimagnets, in which nonzero scalar spin chirality arises from the modulation of spin structure through Dzyaloshinsky–Moriya (DM) interaction. Such a DM-interaction-mediated topological Hall effect is a new type of topological Hall effect. Also the temperature dependence of topological Hall terms in the thermal Hall effect and Nernst–Ettingshausen effect is found to be totally different from that in the electrical Hall effect.

These results will be useful for applications of spin current to devices with low power consumption.

Keywords

Anomalous Hall Effect Berry Phase of Electrons Dzyaloshinsky-Moriya Interaction Itinerant Ferromagnet Itinerant Helimagnet Prize Winning Thesis Scalar Spin Chirality Skew-scattering Mechanism Topological Hall Effect

Authors and affiliations

  • Yuki Shiomi
    • 1
  1. 1., Department of Applied Physicsthe University of TokyoTokyoJapan

Bibliographic information

  • DOI https://doi.org/10.1007/978-4-431-54361-9
  • Copyright Information Springer Japan 2013
  • Publisher Name Springer, Tokyo
  • eBook Packages Physics and Astronomy
  • Print ISBN 978-4-431-54360-2
  • Online ISBN 978-4-431-54361-9
  • Series Print ISSN 2190-5053
  • Series Online ISSN 2190-5061
  • About this book