Decorations of magnetic flux pinning positions on the (001) face of a single crystal of high-tcsuperconductor yba2(cu, au)307δ

R. Blum, M. Audier, Y. Brechet, F. Wmss, J. P. S É Nateur, A. Rouault

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Abstract

The Bitter pattern technique has been used in order to decorate the magnetic structures, exhibited by a single crystal of the high-Tcsuperconductor YBa2(Cu, Au)307δat 4·2 K as a function of the applied magnetic field in a ‘fieldcooling’ condition. The decoration reproducibility of some structural faults, under different magnetic fields, has been examined. The two-dimensional lattice of magnetic flux lines, rectangular at low fields, has been found to evolve towards a hexagonal symmetry at elevated magnetic fields; the variation in the average Wigner-Seitz cell area, relative to a magnetic flux line quantum, appears to be inversely proportional to the applied magnetic fields.

Original languageEnglish
Pages (from-to)113-120
Number of pages8
JournalPhilosophical Magazine Letters
Volume65
Issue number2
DOIs
Publication statusPublished - Feb 1992
Externally publishedYes

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