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

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

Superconductive Systems Engineering Laboratory

Research output: Contribution to journal › Article › peer-review

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 J_c 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 I_c is possibly influenced significantly if the filament size reaches 100μm scale because of current blocking obstacles.

Original language	English
Pages (from-to)	27-31
Number of pages	5
Journal	Research Reports on Information Science and Electrical Engineering of Kyushu University
Volume	12
Issue number	1
Publication status	Published - Mar 1 2007

All Science Journal Classification (ASJC) codes

Computer Science(all)
Electrical and Electronic Engineering

Cite this

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.

Local current flow and dissipation in multi-filamentary YBCO coated conductor under the influence of microstructural inhomogeneity. / Zulkifli, Zulistiana; Fujiwara, Takashi; Nakamura, Tomoya et al.
In: Research Reports on Information Science and Electrical Engineering of Kyushu University, Vol. 12, No. 1, 01.03.2007, p. 27-31.

Research output: Contribution to journal › Article › peer-review

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, vol. 12, no. 1, pp. 27-31.

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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.",

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AU - Zulkifli, Zulistiana

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AU - Nakamura, Tomoya

AU - Kiss, Takanobu

AU - Enpuku, Keiji

AU - Watanabe, Tomonori

AU - Kashima, Naoji

AU - Mori, Masami

AU - Nagaya, Shigeo

AU - Ibi, Akira

AU - Yamada, Yutaka

AU - Shiohara, Yuh

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AB - 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.

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

Abstract

All Science Journal Classification (ASJC) codes

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