TY - JOUR
T1 - Jc enhancement in YEa2Cu3Ox thin films by introduction of one-dimensional artificial pinning centers
AU - Matsuraoto, K.
AU - Horide, T.
AU - Mele, P.
AU - Ichinose, A.
AU - Horii, S.
AU - Yoshida, Y.
AU - Mukaida, M.
AU - Osamura, K.
N1 - Funding Information:
Manuscript received October 4, 2004. This work was supported by a CREST project of Japan Science Technology Agency. K. Matsumoto, T. Horide, P. Mele, and K. Osamura are with the Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan (e-mail: matsu@hightc.mtl.kyoto-u.ac.jp; horide@hightc.mtl.kyoto-u.ac.jp; takahara@hightc.mtl.kyoto-u.ac.jp; osamura@hightc.mtl.kyoto-u.ac.jp). A. Ichinose is with Central Research Institute of Electric Power Industry, Yokosuka 240-0196, Japan (e-mail: ai@criepi.denken.or.jp). S. Horii is with the Department of Superconductivity, University of Tokyo, Tokyo 113-8656, Japan (e-mail: tholy@mail.ecc.u-tokyo.ac.jp). Y. Yoshida is with the Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8603, Japan (e-mail: yoshida@ nuee.nagoya-u.ac.jp). M. Mukaida is with the Department of Electrical and Information Engineering, Yamagata University, Yonezawa 992-8510, Japan (e-mail: mukaida@yz.yamagata-u.ac.jp). Digital Object Identifier 10.1109/TASC.2005.849428
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/6
Y1 - 2005/6
N2 - A novel technology to introduce artificial pinning centers (APCs) into YBa2Cu3O7-δ (YBCO) thin films prepared by pulsed laser deposition (PLD) was investigated for a drastic improvement of Jc in the films. Linear-like defects (one-dimensional APCs) were introduced perpendicular to the surface of the c-axis oriented films during the deposition process by using distributed Y2O3 nano-islands on substrates. The density of nano-islands was varied within 0.8 - 1.2 × 1010/cm2 by PLD. A normalized resistivity as a function of temperature in magnetic fields shows a sharper resistivity drop for the film with APC, compared to pure YBCO film. Jc of the film with APC was also increased to 0.12 MA/cm2 (77 K, B//c, 5 T), which was about two times higher than that of the pure YBCO film. The film had a very large J c peak when the field was applied close to the c-axis. The peak Jc increased with the number density of Y2O3 nano-islands. This indicates that strong APCs parallel to the c-axis were incorporated into the YBCO film.
AB - A novel technology to introduce artificial pinning centers (APCs) into YBa2Cu3O7-δ (YBCO) thin films prepared by pulsed laser deposition (PLD) was investigated for a drastic improvement of Jc in the films. Linear-like defects (one-dimensional APCs) were introduced perpendicular to the surface of the c-axis oriented films during the deposition process by using distributed Y2O3 nano-islands on substrates. The density of nano-islands was varied within 0.8 - 1.2 × 1010/cm2 by PLD. A normalized resistivity as a function of temperature in magnetic fields shows a sharper resistivity drop for the film with APC, compared to pure YBCO film. Jc of the film with APC was also increased to 0.12 MA/cm2 (77 K, B//c, 5 T), which was about two times higher than that of the pure YBCO film. The film had a very large J c peak when the field was applied close to the c-axis. The peak Jc increased with the number density of Y2O3 nano-islands. This indicates that strong APCs parallel to the c-axis were incorporated into the YBCO film.
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U2 - 10.1109/TASC.2005.849428
DO - 10.1109/TASC.2005.849428
M3 - Article
AN - SCOPUS:22144476144
SN - 1051-8223
VL - 15
SP - 3774
EP - 3777
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2 PART III
ER -