Microstructure and critical current density of Bi2212 tapes grown by magnetic melt-processing

H. Maeda, K. Ohya, M. Sato, W. P. Chen, K. Watanabe, M. Motokawa, A. Matsumoto, H. Kumakura, J. Schwartz

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Vertical magnetic fields up to 9 T were applied to the magnetic melt-processing (MMP) of dip-coated and Ag-sheathed Bi2212 mono-core tapes with a core thickness of about 150 μm, which were set horizontally. SEM observation shows that a uniform high-degree of texture is formed throughout the thickness of the tapes by the magnetic field Ha during MMP, whereas a large portion of the area is non-textured without Ha. The critical current density Jc of the tapes increases with increasing Ha up to about 6 T due to the texture development. However, when Ha>6 T some disturbance in Jc appears; one is increased and the other is decreased. This may be due to the change of O2 atmosphere around the tapes during MMP, which comes from the change of O2 gas flowing by the magnetic field. The results suggest that a high magnetic field is very effective to enhance the texture development and to fabricate tapes with high critical current Ic.

Original languageEnglish
Pages (from-to)33-37
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume382
Issue number1
DOIs
Publication statusPublished - 2002 Oct 15

Keywords

  • Bi-2212/Ag tape
  • Critical current density
  • Magnetic field melt growth process
  • Texture

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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    Maeda, H., Ohya, K., Sato, M., Chen, W. P., Watanabe, K., Motokawa, M., Matsumoto, A., Kumakura, H., & Schwartz, J. (2002). Microstructure and critical current density of Bi2212 tapes grown by magnetic melt-processing. Physica C: Superconductivity and its applications, 382(1), 33-37. https://doi.org/10.1016/S0921-4534(02)01192-9