Spin Fluctuations in Itinerant Electron Magnetism

  • Tôru Moriya

Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 56)

Table of contents

  1. Front Matter
    Pages I-X
  2. Tôru Moriya
    Pages 1-14
  3. Tôru Moriya
    Pages 109-128
  4. Tôru Moriya
    Pages 157-193
  5. Tôru Moriya
    Pages 194-213
  6. Tôru Moriya
    Pages 223-224
  7. Back Matter
    Pages 225-243

About this book

Introduction

Ferromagnetism of metallic systems, especially those including transition metals, has been a controversial subject of modern science for a long time. This controversy sterns from the apparent dual character of the d-electrons responsible for magnetism in transition metals, i.e., they are itinerant elec­ trons described by band theory in their ground state, while at finite tem­ peratures they show various properties that have long been attributed to a system consisting of local magnetic moments. The most familiar example of these properties is the Curie-Weiss law of magnetic susceptibility obeyed by almost all ferromagnets above their Curie temperatures. At first the problem seemed to be centered around whether the d-elec­ trons themselves are localized or itinerant. This question was settled in the 1950s and early 1960s by various experimental investigations, in particular by observations of d-electron Fermi surfaces in ferromagnetic transition metals. These observations are generally consistent with the results of band calculations. Theoretical investigations since then have concentrated on explaining this dual character of d-electron systems, taking account of the effects of electron-electron correlations in the itinerant electron model. The problem in physical terms is to study the spin density fluctuati·ons, which are ne­ glected in the mean-field or one-electron theory, and their influence on the physical properties.

Keywords

Electron Magnetism Spin band structure band theory electron electron correlations magnetism magnetization phase transition scattering semiconductor

Authors and affiliations

  • Tôru Moriya
    • 1
  1. 1.Institute of Solid State PhysicsUniversity of TokyoRoppongi, Minato-ku, Tokyo 106Japan

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-642-82499-9
  • Copyright Information Springer-Verlag Berlin Heidelberg 1985
  • Publisher Name Springer, Berlin, Heidelberg
  • eBook Packages Springer Book Archive
  • Print ISBN 978-3-642-82501-9
  • Online ISBN 978-3-642-82499-9
  • Series Print ISSN 0171-1873
  • About this book