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Investigation of In-Field Properties of YBCO Film with Artificial Pinning Centers

Published online by Cambridge University Press:  01 February 2011

Hiroyoshi Kobayashi
Affiliation:
h.kobayashi@istec.or.jp, International Superconductivity Technology Center, NAGOYA Coated Conductor Center, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, NAGOYA, AICHI, 456-8587, Japan, 81-52-871-4002, 81-52-871-4090
Satoru Ishida
Affiliation:
stishida@istec.or.jp, ISTEC, SRL-Nagoya, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, NAGOYA, AICHI, 456-8587, Japan
Kazuhiro Takahashi
Affiliation:
ktakahashi@istec.or.jp, ISTEC, SRL-Nagoya, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, NAGOYA, AICHI, 456-8587, Japan
Masaya Konishi
Affiliation:
masaya-konishi@istec.or.jp, ISTEC, SRL-Nagoya, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, NAGOYA, AICHI, 456-8587, Japan
Akira Ibi
Affiliation:
ibi@istec.or.jp, ISTEC, SRL-Nagoya, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, NAGOYA, AICHI, 456-8587, Japan
Seiki Miyata
Affiliation:
miyata@istec.or.jp, ISTEC, SRL-Nagoya, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, NAGOYA, AICHI, 456-8587, Japan
Yutaka Yamada
Affiliation:
yyamada@istec.or.jp, ISTEC, SRL-Nagoya, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, NAGOYA, AICHI, 456-8587, Japan
Yuh Shiohara
Affiliation:
shiohara@istec.or.jp, ISTEC, SRL, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, TOKYO, 135-0062, Japan
Takeharu Kato
Affiliation:
tkato@jfcc.or.jp, JFCC, SRL-Nagoya, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, NAGOYA, AICHI, 456-8587, Japan
Tsukasa Hirayama
Affiliation:
thirayama@jfcc.or.jp, JFCC, SRL-Nagoya, 4-1,MUTSUNO 2-CHOME,ATSUTA-KU, NAGOYA, AICHI, 456-8587, Japan
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Abstract

We have investigated the thickness dependence of critical current for YBa2Cu3O7-x (YBCO) film with artificial pinning centers on metallic substrate. Artificial pinning centers were introduced by the pulsed laser deposition (PLD) using YBCO target including YSZ particles. The film over 1 μm in thickness exhibited with high critical current (Ic) of 40.7A in applied magnetic field of 3T parallel to the c-axis at 77K. This value was 5 times as high as the normal YBCO film without artificial pinning centers. The large Ic enabled us to approach to a practical application in the near future. Furthermore, it was clarified that the columnar nano-structure formed in the film, we call “the bamboo structure”, was a dominant pinning center because each Jc-θ curve of all thick films formed a universal line by the normalization of Jc. In addition, it was also found that YSZ addition has an optimal concentration for pinning by the study of YSZ concentration in the film.

Type
Research Article
Copyright
Copyright © Materials Research Society 2006

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References

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Investigation of In-Field Properties of YBCO Film with Artificial Pinning Centers
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