Magneto optical observations of flux dynamics in Nd-Ba-Cu-O bulk superconductors

M. Zamboni, S. I. Yoo, T. Higuchi, K. Waki, S. Koishikawa, Masato Murakami

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1 Citation (Scopus)

Abstract

The magnetic flux dynamics of Nd-Ba-Cu-O (NdBCO) bulk superconductors produced by the Oxygen-Controlled-Melt-Growth (OCMG) method has been investigated using the Magneto-Optical (M-O) technique at various low temperatures for an external magnetic field applied both parallel (H//c) and perpendicular (H⊥c) to the c-axis of the sample. While for H//c the flux motion was isotropic, for H⊥c anisotropic penetration and expulsion of the flux lines was observed directly. In the configuration H⊥c the flux lines were observed to move in and out the sample predominantly parallel to the a-b planes. The flux behaviour has also been correlated to the microstructure. Particularly, microcracks along the basal plane were found to provide a low resistance channel for flux motion.

Original languageEnglish
Pages (from-to)185-188
Number of pages4
JournalMaterials Science and Engineering B
Volume53
Issue number1-2
Publication statusPublished - 1998 May 1
Externally publishedYes

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Keywords

  • Anisotropy
  • Flux dynamics
  • Iron-garnet films
  • Magneto optical technique
  • Nd-Ba-Cu-O superconductors

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Zamboni, M., Yoo, S. I., Higuchi, T., Waki, K., Koishikawa, S., & Murakami, M. (1998). Magneto optical observations of flux dynamics in Nd-Ba-Cu-O bulk superconductors. Materials Science and Engineering B, 53(1-2), 185-188.