Local current flow and dissipation in multi-filamentary YBCO coated conductor under the influence of microstructural inhomogeneity

Zulistiana Zulkifli, Takashi Fujiwara, Tomoya Nakamura, Takanobu Kiss, Keiji Enpuku, Tomonori Watanabe, Naoji Kashima, Masami Mori, Shigeo Nagaya, Akira Ibi, Yutaka Yamada, Yuh Shiohara

Research output: Contribution to journalArticle

Abstract

Local current flow and dissipation in a three parallel 100μm-wide filamentary YBCO tape had been studied in order to investigate the current carrying capability in each filament under the influence of local obstacles. Structural inhomogeneity and local flux flow dissipation have been visualized by using thermal laser stimulation technique and its local current density was measured by scanning SQUID microscope. By combining local current distribution with dissipation, we made estimations on local the Jc and I c values in each filament. Results have shown a current imbalance on the current sharing in the filamentary structure. It has been shown that the Ic is possibly influenced significantly if the filament size reaches 100μm scale because of current blocking obstacles.

Original languageEnglish
Pages (from-to)27-31
Number of pages5
JournalResearch Reports on Information Science and Electrical Engineering of Kyushu University
Volume12
Issue number1
Publication statusPublished - Mar 1 2007

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Electrical and Electronic Engineering

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    Zulkifli, Z., Fujiwara, T., Nakamura, T., Kiss, T., Enpuku, K., Watanabe, T., Kashima, N., Mori, M., Nagaya, S., Ibi, A., Yamada, Y., & Shiohara, Y. (2007). Local current flow and dissipation in multi-filamentary YBCO coated conductor under the influence of microstructural inhomogeneity. Research Reports on Information Science and Electrical Engineering of Kyushu University, 12(1), 27-31.