2005, 2003, English, Article edition: Flux line lattice structure and behaviour in anti-phase boundary free vicinal YBa2Cu3O7-d thin films Durrell, John Hay; Mennema, S. H.; Jooss, Ch.; ...

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Physical Description
  • 580598 bytes, application/​pdf
Published
  • 2005-06-10T14:06:27Z
  • 2003
Language
  • English

Edition details

Title
  • Flux line lattice structure and behaviour in anti-phase boundary free vicinal YBa2Cu3O7-d thin films
Author
  • Durrell, John Hay
  • Mennema, S. H.
  • Jooss, Ch.
  • Gibson, Gary
  • Barber, Zoe H.
  • Zandbergen, H. W.
  • Evetts, Jan E.
Published
  • 2005-06-10T14:06:27Z
  • 2003
Physical Description
  • 580598 bytes, application/​pdf
Subjects
Notes
  • Field angle dependent critical current, magneto-optical microscopy, and high resolution electron microscopy studies have been performed on YBa2Cu3O7-d thin films grown on mis-cut substrates. High resolution electron microscopy images show that the films studied exhibited clean epitaxial growth with a low density of anti-phase boundaries and stacking faults. Any anti-phase boundaries (APBs) formed near the film substrate interface rapidly healed rather than extending through the thickness of the film. Unlike vicinal films grown on annealed substrates, which contain a high density of anti-phase boundaries, magneto optical imaging showed no filamentary flux penetration in the films studied. The flux penetration is, however, asymmetric. This is associated with intrinsic pinning of flux strings by the tilted a-b planes and the dependence of the pinning force on the angle between the local field and the a-b planes. Field angle dependent critical current measurements exhibited the striking vortex channelling effect previously reported in vicinal films. By combining the results of three complementary characterisation techniques it is shown that extended APB free films exhibit markedly different critical current behaviour as compared to APB rich films. This is attributed to the role of APB sites as strong pinning centres for Josephson string vortices between the a-b planes.
  • cond-mat;0301500
  • Journal of Applied Physics, 93 (12), 9869
Language
  • English
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