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{\rm GdBa}_{2}{\rm Cu}_{3}{\rm O}_{7-\delta } Coated Conductor on {\rm BaZrO}_{3} -Buffered IBAD-MgO Template

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7 Author(s)
Kyoung-Pil Ko ; Dept. of Mater. Sci. & Eng., Seoul Nat. Univ., Seoul, South Korea ; Rock-Kil Ko ; Lee, Sung-Yun ; Ho-Kyum Kim
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We report a successful fabrication of GdBa2Cu3O7-delta (GdBCO) coated conductor on the ion-beam assisted deposition (IBAD) MgO template with a new buffer layer of BaZrO3 (BZO). The BZO films were deposited on the IBAD-MgO template at various substrate temperatures (T S) and oxygen partial pressures (PO2) by pulsed laser deposition (PLD). In the broad ranges of T S and PO2, all BZO layers showed almost uniform in-plane texture (Deltaphi of ~ 6deg ), implying that BZO is an attractive buffer layer. The surface roughness of BZO layer was sensitive to PO2 but not to T S. On the optimally processed BZO buffer layer with 5.1 nm RMS roughness, GdBCO coated conductor deposited at T S of 750degC and PO2 of 400 mTorr exhibited Deltaphi of 4.4deg , T c,zero of 90.3 K, and J c of 1.35 MA/cm2 (77 K, self-field).

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:19 ,  Issue: 3 )

Date of Publication:

June 2009

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