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Structure and Phase Transitions in V2D and V2H

  • S. C. Moss
Part of the NATO Conference Series book series (NATOCS, volume 6)

Abstract

The structure and phase transitions in V2D and V2H are reviewed. Prior neutron studies of site occupancy and phase transitions are compared with more recent x-ray studies in which the interstitial ordering is accompanied by modulated host atom displacements. This has permitted x-ray scattering to be used as a sensitive probe of both the ordered and disordered states. We suggest that the transfer from disordered tetrahedral to ordered octahedral occupancy occurs through a [1/2 1/2 0] modulation wave which slides, on cooling, from local tetrahedral to local octahedral modulation. New results on the second order phase transition in V2H suggest that it is an excellent example of an Ising-like transition modified by the presence of a nearby tricritical point.

Keywords

Phase Transition Order Phase Transition Tetrahedral Site Site Occupancy Tricritical Point 
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

© Plenum Press, New York 1983

Authors and Affiliations

  • S. C. Moss
    • 1
  1. 1.Physics DepartmentUniversity of HoustonHoustonUSA

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