Magnetism in Amorphous Solids

  • J. M. D. Coey
Part of the Physics of Solids and Liquids book series (PSLI)

Abstract

This chapter aims at providing an overview of collective magnetism in noncrystalline solids. It is descriptive in outlook, and sets out to relate some of the key ideas of amorphous magnetism to well-established concepts of magnetism in crystalline solids, stressing the points where something new emerges because of the lack of a crystal lattice. For example, there are many amorphous ferromagnets yet no amorphous antiferromagnets are known to exist. Why not? In the area of amorphous and disordered solids, magnetism continues to play its traditional role of introducing concepts and posing problems that can be formalized in terms of simplified yet not completely unrealistic models, whose usefulness extends far beyond explaining the magnetic properties of solids. Past examples of this sort have been in the areas of phase transitions, elementary excitations, two-level systems, and physics in one or two dimensions. Another important facet is the practical potential of amorphous magnets that provides a ready justification for working in the field. The scope for applications of these materials will be discussed briefly. However, the bulk of the chapter is devoted to a discussion of magnetic order in amorphous solids, and the influence of a nonperiodic lattice on its ingredients. Beside the magnetic ground states themselves, topics of interest are defects, excitations, and the manner in which the magnetically ordered state breaks up with increasing temperature. For a more detailed discussion and bibliography on the subjects raised here, the reader is referred to recent monographs and review articles.(1–6)

Keywords

Metallic Glass Spin Glass Isothermal Remanent Magnetization Amorphous Solid Atomic Moment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1985

Authors and Affiliations

  • J. M. D. Coey
    • 1
  1. 1.Department of Pure and Applied PhysicsTrinity CollegeDublin 2Ireland

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