Observation of nucleation and annihilation of flux-lines with opposite sign in high-Tc superconductors

Th Schuster, M. R. Koblischka, N. Moser, H. Kronmüller

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Using the high-resolution Faraday effect (HRF), we observed nucleation of domains in high-Tc single crystals consisting of flux-lines with opposite signs while reducing the applied external magnetic field to zero. This nucleation of domains with reversed flux-lines is found in YBa2Cu3O7-δ single crystals as well as in Bi2Sr2CaCu2O7-δ single crystals. The resulting domain pattern in the remanent state is then composed of domains with opposite polarity which are seperated by an annihilation zone. An experimental proof for the existence of opposite signs of the vortices has been given by observing the behaviour of the domains on the direction of the applied external magnetic field. We also show the dependence of the width of the annihilation zone on the external magnetic field, indicating the role of the pinning forces on this behaviour.

Original languageEnglish
Pages (from-to)269-278
Number of pages10
JournalPhysica C: Superconductivity and its applications
Issue number4-6
Publication statusPublished - 1991 Sept 1
Externally publishedYes

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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