Study of flux behavior in Bi2Sr2CaCu2O8 single crystal in external magnetic fields up to 1 T

M. R. Koblischka, R. J. Wijngaarden, D. G. de Groot, R. Griessen, A. A. Menovsky, T. W. Li

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Using the high-resolution Faraday effect (HRF) technique, the behavior of magnetic flux in Bi2Sr2CaCu2O8 single crystals is visualized in external magnetic fields up to 1 T. This technique reveals defects in many of these crystals which are probably twin planes. X-ray measurements indicate that two adjacent crystallites have c-axis lattice vectors which deviate from each other by about one degree. As a consequence of these defects, the shielding currents break up in sub-loops, each shielding a defect-free part of the sample. This leads to an underestimate of the critical current values determined by non-local magnetization measurements. Magneto-optical images can be used to calculate the necessary correction.

Original languageEnglish
Pages (from-to)339-349
Number of pages11
JournalPhysica C: Superconductivity and its applications
Volume249
Issue number3-4
DOIs
Publication statusPublished - 1995 Jul 15

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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