TY - JOUR
T1 - Fabrication of thick YBa2Cu3O7-x films on optimized SrTiO3 buffered-MgO single crystals
AU - Mele, P.
AU - Matsumoto, K.
AU - Horide, T.
AU - Ichinose, A.
AU - Mukaida, M.
AU - Yoshida, Y.
AU - Horii, S.
N1 - Funding Information:
Manuscript received August 29, 2006. This work was supported by a CREST project of Japan Science Technology Agency. P. Mele, K. Matsumoto, and T. Horide are with the Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan (e-mail: pmele@htsc.mbox.media.kyoto-u.ac.jp; kaname.matsumoto@materials.mbox. media.kyoto-u.ac.jp; tomoya.horide@t04.mbox.media.kyoto-u.ac.jp). A. Ichinose is with the Central Research Institute of Electric Power Industry, Yokosuka 240-0196, Japan (e-mail: ai@criepi.denken.or.jp). M. Mukaida is with the Department of Materials Science and Engineering, Kyushu University, Fukuoka 819-0395, Japan (e-mail: mukaida@zaiko. kyushu-u.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). S. Horii is with the Department of Superconductivity, University of Tokyo, 113-8656 Japan (e-mail: tholy@mail.ecc.u-tokyo.ac.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.2007.897422
PY - 2007/6
Y1 - 2007/6
N2 - In this work, we studied the optimum deposition conditions for SrTiO 3 (STO) buffers deposited on MgO single crystals substrates by PLD method. We found that 120 nm thick STO films, deposited at 730 °C, present the smoothest surface and a minimum FWMH of the (002) reflection. High quality, smooth and free-crack YBa2Cu3O7-x (YBCO) thick superconducting films have then been fabricated using a deposition temperature of 800 °C on STO-buffered MgO substrates. A 373 nm thick YBCO/STO/MgO film can carry current densities Jc (77 K, 0 T) of 1.4 MA/cm2 and Jc (77 K, 5 T) of 0.14 MA/cm2. The Jc in high field overcomes the current transported in same experimental conditions by 180 nm thick YBCO film grown on Y2O3-decorated STO single crystal. For 1350 nm thick YBCO/STO/MgO film the Jc (77 K, 0 T) is about 0.8 MA/cm2 and Jc (77 K, 5 T) is 0.09 MA/cm 2.
AB - In this work, we studied the optimum deposition conditions for SrTiO 3 (STO) buffers deposited on MgO single crystals substrates by PLD method. We found that 120 nm thick STO films, deposited at 730 °C, present the smoothest surface and a minimum FWMH of the (002) reflection. High quality, smooth and free-crack YBa2Cu3O7-x (YBCO) thick superconducting films have then been fabricated using a deposition temperature of 800 °C on STO-buffered MgO substrates. A 373 nm thick YBCO/STO/MgO film can carry current densities Jc (77 K, 0 T) of 1.4 MA/cm2 and Jc (77 K, 5 T) of 0.14 MA/cm2. The Jc in high field overcomes the current transported in same experimental conditions by 180 nm thick YBCO film grown on Y2O3-decorated STO single crystal. For 1350 nm thick YBCO/STO/MgO film the Jc (77 K, 0 T) is about 0.8 MA/cm2 and Jc (77 K, 5 T) is 0.09 MA/cm 2.
KW - Artificial pinning centers
KW - Buffer layers
KW - Critical current density
KW - Thick films
KW - YBaCuO
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U2 - 10.1109/TASC.2007.897422
DO - 10.1109/TASC.2007.897422
M3 - Article
AN - SCOPUS:34547442513
VL - 17
SP - 3713
EP - 3716
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 2
ER -