Use of SrTiO/sub 3/ as a single buffer layer for RABiTS YBCO coated conductor

SrTiO/sub 3/ (STO) films were epitaxially deposited by PLD on textured Ni-3wt%W (Ni-3W) substrates. The STO film was deposited in two steps-reducing atmosphere first, and then oxidizing atmosphere-to prevent the oxidation of the metal surface from hindering the epitaxial relationship between the fil...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2005-06, Vol.15 (2), p.3020-3023
Main Authors: Chung, Jun-Ki, Ko, Rock-Kil, Shi, Dong-Qi, Ha, Hong-Soo, Kim, Hosup, Song, Kyu-Jeong, Park, Chan, Moon, Seung-Hyun, Yoo, Sang-Im
Format: Article
Language:English
Subjects:
Buffer layers
Chemicals
Coated conductors
Conducting materials
Conductive films
Conductors
High temperature superconductors
PLD
single buffer layer
Substrates
Superconducting epitaxial layers
Superconducting films
YBCO
Yttrium barium copper oxide
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Summary:SrTiO/sub 3/ (STO) films were epitaxially deposited by PLD on textured Ni-3wt%W (Ni-3W) substrates. The STO film was deposited in two steps-reducing atmosphere first, and then oxidizing atmosphere-to prevent the oxidation of the metal surface from hindering the epitaxial relationship between the film and the substrate. The deposited STO films exhibited sharp biaxial texture and dense surface. YBCO films were epitaxially deposited on STO/Ni-3W and showed J/sub c/(77K, self field)=1.2MA/cm/sup 2/ and T/sub c/(onset)=88 K. Auger electron spectrometry depth profile analyses show that the STO film can block the diffusion of the metal from the substrate. This work has shown that STO films epitaxially deposited on textured Ni-3W substrate can be used as a single buffer layer of the high current carrying YBCO coated conductor.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2005.848709