“Band Based” Methods for Magnetic Response

  • D. M. Edwards
Part of the NATO ASI Series book series (NSSB, volume 117)

Abstract

These lectures are concerned with methods of treating magnetic response within the framework of band theory. These methods have mostly been developed with application to transition metals and alloys in mind, and such applications form the central core of the present material. However, we shall attempt to discuss the extent to which such methods may be applied to other systems, such as actinide and even intermediate valence compounds. An approach based on band theory is certainly called for when the electrons responsible for the formation of magnetic moments are strongly itinerant, moving rapidly from atom to atom. In this case, as with the 3d electronsin transition metals or 5f electrons in some actinide systems, the magnetic electrons contribute importantly to bonding and to the Fermi surface. However, the application of band theory to such systems cannot be too naive. The existence of magnetic moments indicates that the interaction between electrons is important so that correlation effects are strong. Treatment of correlation has proceeded along various lines:

Keywords

Spin Wave Random Phase Approximation Paramagnetic State Mixed Valence Local Moment 
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Copyright information

© Springer Science+Business Media New York 1984

Authors and Affiliations

  • D. M. Edwards
    • 1
  1. 1.Department of MathematicsImperial CollegeLondonUK

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