TY - JOUR
T1 - Visualizing transport properties in IBAD based YBCO coated conductors by multiple analysis techniques
AU - Kiss, T.
AU - Inoue, M.
AU - Shoyama, T.
AU - Koyanagi, S.
AU - Mitsui, D.
AU - Nakamura, T.
AU - Imamura, K.
AU - Ibi, A.
AU - Yamada, Y.
AU - Kato, T.
AU - Hirayama, T.
AU - Shiohara, Y.
N1 - Funding Information:
Manuscript received August 29, 2006. This work was supported in part by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications and by JSPS: KAKENHI (15360151). T. Kiss, M. Inoue, T. Shoyama, S. Koyanagi, D. Mitsui, T. Nakamura, and K. Imamura are with Kyushu University, Fukuoka 812-8581, Japan (e-mail: kiss@sc.kyushu-u.ac.jp). A. Ibi and Y. Yamada are with the Nagoya Coated Conductor Center, SRL, Nagoya 456-8587, Japan (e-mail: yyamada@istec.or.jp). T. Kato and T. Hirayama are with the Japan Fine Ceramics Center, Nagoya 456-8587, Japan (e-mail: tkato@jfcc.or.jp). Y. Shiohara is with the Superconductivity Research Laboratory, Tokyo 135-0062, Japan (e-mail: shiohara@istec.or.jp). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2007.898922
PY - 2007/6
Y1 - 2007/6
N2 - Current transport properties in Y1Ba2Cu 3O7-δ (YBCO) coated conductors obtained by pulsed laser deposition process on a CeO2 capped Gd2Zr 2O7-IBAD template have been studied by spatially resolved measurements. We utilized low temperature scanning laser microscopy along with laser induced Seebeck effect imaging and scanning SQUID microscopy that allow us to visualize 1) distributed flux flow dissipation, 2) current blocking obstacles and 3) local current flow, respectively. Combination of those measurements leads deep insights into current limiting mechanism in the coated conductor. Our results show that non-uniform current flow due to spatially distributed obstacles is responsible for the dissipation, whereas grain connectivity in each YBCO grains is not the limiting factor. Typical period of those obstacles is several tens μm to hundreds μm. Detailed correlation between local current flow and dissipation has been observed. Present methods have great potential as tools for basic understanding of current limiting mechanisms in the coated conductors.
AB - Current transport properties in Y1Ba2Cu 3O7-δ (YBCO) coated conductors obtained by pulsed laser deposition process on a CeO2 capped Gd2Zr 2O7-IBAD template have been studied by spatially resolved measurements. We utilized low temperature scanning laser microscopy along with laser induced Seebeck effect imaging and scanning SQUID microscopy that allow us to visualize 1) distributed flux flow dissipation, 2) current blocking obstacles and 3) local current flow, respectively. Combination of those measurements leads deep insights into current limiting mechanism in the coated conductor. Our results show that non-uniform current flow due to spatially distributed obstacles is responsible for the dissipation, whereas grain connectivity in each YBCO grains is not the limiting factor. Typical period of those obstacles is several tens μm to hundreds μm. Detailed correlation between local current flow and dissipation has been observed. Present methods have great potential as tools for basic understanding of current limiting mechanisms in the coated conductors.
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U2 - 10.1109/TASC.2007.898922
DO - 10.1109/TASC.2007.898922
M3 - Article
AN - SCOPUS:34547446606
VL - 17
SP - 3211
EP - 3214
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 2
ER -