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Journal of Superconductivity

, Volume 8, Issue 1, pp 79–85 | Cite as

Magnetic behaviour and vortex lattice transition in YBa2Cu3O7−δ

  • Zhou Shi-ping
  • G. R. Court
Article

Abstract

Magnetic susceptibility measurements on YBa2Cu3O7−δ rod materials by an ac balanced bridge technique are made in fields of up to 50 mT and over the temperature range from 4.2 K to just belowT c . A largeH c2 accompanied by characteristic form of hysteresis has been shown. A modified critical state model of Anderson [Phys. Rev. Lett.9, 309 (1962)] is adapted to fit the curves in the region where hysteresis is dominant because of flux trapping. A conceptual model of structure vortex lattice transition due to the intrinsic pinning of the layering configuration is suggested, which can provide an explanation of the magnetic behaviour of oxide superconductors.

Key words

Susceptibility mixed state pinning structure vortex lattice transition 

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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • Zhou Shi-ping
    • 1
    • 2
  • G. R. Court
    • 2
  1. 1.Physics DepartmentShanghai University of Science and TechnologyShanghaiP. R. China
  2. 2.Physics DepartmentUniversity of LiverpoolLiverpoolEngland

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