Observation of Vortex Lattice melting in twinned YBa2Cu3O7-x using neutron small angle scattering

CM Aegerter, ST Johnson, WJ Nuttall, SH Lloyd, MT Wylie, MP Nutley, EM Forgan, R Cubitt, Stephen Leslie Lee, DMcK Paul, M Yethiraj, HA Mook

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17 Citations (Scopus)

Abstract

A neutron small-angle scattering study of the flux-line lattice in heavily twinned YBa2Cu3O7-x is presented. It is found that the diffraction signal disappears at temperatures well below: T-c, associated with a melting of the flux lattice. The shape of the melting line is consistent with both a Lindemann criterion and the scaling expected for a vortex-glass transition with the superconducting parameters from the three-dimensional XY model. The influence of twin planes on the structure of the vortex lattice and its melting is studied by applying; the field at different angles to the c axis. The results are compared with recent specific heat measurements on similar crystals.

Original languageEnglish
Pages (from-to)14511
Number of pages14511
JournalPhysical Review. B, Condensed matter and materials physics
Volume57
Publication statusPublished - 1 Jun 1998

Keywords

  • SINGLE-CRYSTAL YBA2CU3O7
  • MAGNETIC-FLUX LATTICE
  • ELECTRONIC-STRUCTURE
  • ELASTIC THEORY
  • SUPERCONDUCTORS
  • TRANSITION
  • DISORDER
  • SYMMETRY
  • HEAT

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