Neutron measurements of the vortex lattice in YBa2Cu 3O7 (invited)

H. A. Mook*, M. Yethiraj, G. D. Wignall, E. M. Forgan, S. L. Lee, R. Cubitt, D. Mck Paul, T. Armstrong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Neutron diffraction has been used to measure the vortex lattice scattering for YBa2Cu3O7. A square pattern is found when the field is applied along the c axis, while a triangular pattern is found when the field is applied well away from the c axis. High-resolution measurements for the square pattern show that the vortex lattice has long-range orientational order but only short-range positional order. The temperature dependence of the penetration depth is not that expected for a superconductor with a conventional s-wave BCS-type gap. Preliminary measurements for temperatures near the irreversibility line are consistent with the occurrence of melting of the vortex lattice or glass phase.

Original languageEnglish
Pages (from-to)5855-5859
Number of pages5
JournalJournal of Applied Physics
Volume73
Issue number10
DOIs
Publication statusPublished - 1993

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