磁場中高Jc線材を目指したREBa2Cu3Oy薄膜の作製

伊藤 正和; 吉田 隆; 一野 祐亮; 三浦 正志; 高井 吉明; 松本 要; 一瀬 中; 向田 昌志; 堀井 滋

doi:10.2221/jcsj.39.523

Originals

Fabrication of REBa₂Cu₃O_y Thin Films for High-J_c Coated Conductors in Magnetic Fields

Masakazu ITOH, Yutaka YOSHIDA, Yusuke ICHINO, Masashi MIURA, Yoshiaki TAKAI, Kaname MATSUMOTO, Ataru ICHINOSE, Masashi MUKAIDA, Shigeru HORII

Author information

Masakazu ITOH
Dept. of Energy Engineering and Science, Nagoya Univ.
CREST-Japan Science and Technology Agency
Yutaka YOSHIDA
Dept. of Energy Engineering and Science, Nagoya Univ.
CREST-Japan Science and Technology Agency
Yusuke ICHINO
Dept. of Energy Engineering and Science, Nagoya Univ.
CREST-Japan Science and Technology Agency
Masashi MIURA
Dept. of Energy Engineering and Science, Nagoya Univ.
CREST-Japan Science and Technology Agency
Yoshiaki TAKAI
Dept. of Energy Engineering and Science, Nagoya Univ.
Kaname MATSUMOTO
Dept. of Materials Science, Kyoto Univ.
CREST-Japan Science and Technology Agency
Ataru ICHINOSE
Electroc Power Enginnering Research Lab., Central Research Central Resaerch Institute of Electric Power Industry
CREST-Japan Science and Technology Agency
Masashi MUKAIDA
Dept. of Electrical and Information Engineering, Yamagata Univ.
CREST-Japan Science and Technology Agency
Shigeru HORII
Dept. of Superconductivity, Univ. of Tokyo
CREST-Japan Science and Technology Agency

Keywords: SmBa₂Cu₃O_y thin film, pulsed laser deposition, low temperature growth, superconducting properties

JOURNAL FREE ACCESS

2004 Volume 39 Issue 11 Pages 523-528

DOI https://doi.org/10.2221/jcsj.39.523

Details

Abstract

We developed a low-temperature growth (LTG) technique as a novel deposition process to obtain RE_1+xBa_2-xCu₃O_y (REBCO) thin films with high superconducting properties. SmBCO films fabricated using the LTG-technique (LTG-SmBCO) showed complete c-axis orientations at a low substrate temperature (T_s). This T_s is about 100°C lower than the T_s when fabricating c-axis oriented SmBCO films using the conventional vapor growth method. Moreover, the critical current density (J_c) of the LTG-SmBCO in magnetic fields at 77 K has been improved reaching a high value of 0.17 MA/cm² at 5 T (B//c). The magnetic field angular dependence of the J_c at 77 K in LTG-SmBCO had a smaller anisotropy than that in PLD-SmBCO. From the microstructure observation, we found that the LTG-SmBCO showed a compositional fluctuation in Sm/Ba. We assume that the high J_c of LTG-SmBCO was affected by the solid solution acting as three-dimensional pinning center. From the viewpoint of diffusion in the solid phase, we speculated that this solid solution was generated by the low T_s.

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