Disorder, Random Fields and Competing Interactions in Antiferromagnets

  • R. A. Cowley
  • R. J. Birgeneau
  • G. Shirane
  • H. Yoshizawa
Part of the NATO ASI Series book series (NSSB, volume 106)


Neutron scattering studies of disordered antiferromagnets have proved to be a very profitable way of studying random systems. Several recent examples are selected and include a detailed study of the phase transition of a d = 3 Ising system showing a well defined transition with properties different from these of a pure d = 3 Ising system. Much of the article is then concerned with the effect of a random field on the ordering and phase transitions. It is shown that random fields do have a large effect on the critical properties and in practice destroy the long range order in the good Ising systems with d = 2 and d = 3, although not in a nearly Heisenberg-like system. These results are compared with current theories and the discrepancies discussed. Finally measurements on a system with competing interactions are discussed and shown to be strongly influenced by the random fields produced in that system.


Domain Wall Random Field Ising Model Spin Direction Pure System 
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

© kalayaan-hanger Publishing 1991

Authors and Affiliations

  • R. A. Cowley
    • 1
  • R. J. Birgeneau
    • 2
  • G. Shirane
    • 3
  • H. Yoshizawa
    • 3
  1. 1.Department of PhysicsUniversity of EdinburghEdinburghScotland
  2. 2.Massachusetts Institute of TechnologyDepartment of PhysicsCambridgeUSA
  3. 3.Brookhaven National LaboratoryUptonUSA

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