Imaging of trapped vortices in YBCO coated conductor by scanning SQUID microscope

M. Inoue, T. Kiss, S. Koyanagi, K. Imamura, M. Takeo, Y. Iijima, K. Kakimoto, T. Saitoh, J. Matsuda, Y. Tokunaga, T. Izumi, Y. Shiohara

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Abstract

We investigated trapped vortices in Y1Ba2Cu 3O7-δ (YBCO) coated conductor by using a scanning SQUID microscope (SSM). Several peculiar properties of the vortices were observed such as a large bundle of vortices at a certain position and a coexistence of positive- and negative-sign vortices. Comparing the SSM images with that of low temperature scanning laser microscopy (LTSLM) and SEM, we identified the relationship between local dissipation and position of current blocking defect. Furthermore, regular vortex images were also observed by the SSM in the region where higher Jc has been identified by the LTSLM.

Original languageEnglish
Pages (from-to)1068-1072
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume426-431
Issue numberII
DOIs
Publication statusPublished - Oct 7 2005
EventProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
Duration: Nov 23 2004Nov 25 2004

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All Science Journal Classification (ASJC) codes

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

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