Research on CeO2 cap layer for YBCO-coated conductor

doi:10.1088/1009-1963/16/7/058

中国物理B ›› 2007, Vol. 16 ›› Issue (7): 2142-2147.doi: 10.1088/1009-1963/16/7/058

• • 上一篇

Research on CeO₂ cap layer for YBCO-coated conductor

石东奇¹, KoRock-Kil², KimHo-Sup², ChungJun-Ki², SongKyu-Jeongc², ParkChan³, 马平⁴

(1)Institute for Superconducting and Electronic Materials, University of Wollongong, Australia; (2)Korea Electrotechnology Research Institute, Changwon,Kyungnam,Korea; (3)School of Materials Science {& Engineering, College of Engineering, Seoul National University, Seoul 151-744, Korea; (4)State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China

收稿日期:2006-10-10 修回日期:2007-01-31 出版日期:2007-07-20 发布日期:2007-07-04
基金资助:
Project supported by the 21st Century Frontier R{\&}D Program of the Center for Applied Superconductivity Technology, funded by the Ministry of Science and Technology, Republic of Korea.

Research on CeO₂ cap layer for YBCO-coated conductor

Shi Dong-Qi(石东奇)^a), Ma Ping(马平)^b)^†, Ko Rock-Kil^c), Kim Ho-Sup^c), Chung Jun-Ki^c), Song Kyu-Jeong^c), and Park Chan^d)

^a Institute for Superconducting and Electronic Materials, University of Wollongong, Australia; ^b State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China^c Korea Electrotechnology Research Institute, Changwon, Kyungnam, Korea; ^d School of Materials Science & Engineering, College of Engineering, Seoul National University, Seoul 151-744, Korea

Received:2006-10-10 Revised:2007-01-31 Online:2007-07-20 Published:2007-07-04
Supported by:
Project supported by the 21st Century Frontier R{\&}D Program of the Center for Applied Superconductivity Technology, funded by the Ministry of Science and Technology, Republic of Korea.

摘要/Abstract

摘要： Two groups of coated conductor samples with different thicknesses of CeO₂ cap layers deposited by pulsed laser deposition (PLD) under the same conditions have been studied. Of them, one group is of CeO₂ films, which are deposited on stainless steel (SS) tapes coated by IBAD-YSZ (IBAD-YSZ/SS), and the other group is of CeO₂/YSZ/Y₂O₃ multi-layers, which are deposited on NiW substrates by PLD for the fabrication of YBCO-coated conductor through the RABiTS approach. YBCO film is then deposited on the tops of both types of buffer layers by PLD. The effects of the thickness of the CeO$_{2}$ film on the texture of the CeO₂ film and the critical current density (J_c) of the YBCO film are analysed. For the case of CeO₂ film on IBAD-YSZ/SS, there appears a self-epitaxy effect with increasing thickness of the CeO₂ film. For CeO₂/YSZ/Y₂O₃/NiW, in which the buffer layers are deposited by PLD, there occurs no self-epitaxy effect, and the optimal thickness of CeO₂ is about 50nm. The surface morphologies of the two groups of samples are examined by SEM.

关键词: coated conductor, buffer layer, self-epitaxy, CeO₂

Abstract: Two groups of coated conductor samples with different thicknesses of CeO₂ cap layers deposited by pulsed laser deposition (PLD) under the same conditions have been studied. Of them, one group is of CeO₂ films, which are deposited on stainless steel (SS) tapes coated by IBAD-YSZ (IBAD-YSZ/SS), and the other group is of CeO₂/YSZ/Y₂O₃ multi-layers, which are deposited on NiW substrates by PLD for the fabrication of YBCO-coated conductor through the RABiTS approach. YBCO film is then deposited on the tops of both types of buffer layers by PLD. The effects of the thickness of the CeO$_{2}$ film on the texture of the CeO₂ film and the critical current density (J_c) of the YBCO film are analysed. For the case of CeO₂ film on IBAD-YSZ/SS, there appears a self-epitaxy effect with increasing thickness of the CeO₂ film. For CeO₂/YSZ/Y₂O₃/NiW, in which the buffer layers are deposited by PLD, there occurs no self-epitaxy effect, and the optimal thickness of CeO₂ is about 50nm. The surface morphologies of the two groups of samples are examined by SEM.

Key words: coated conductor, buffer layer, self-epitaxy, CeO₂

中图分类号: (Pulsed laser ablation deposition)

81.15.Fg

74.25.Sv (Critical currents) 74.78.Fk (Multilayers, superlattices, heterostructures)

石东奇, 马平, KoRock-Kil, KimHo-Sup, ChungJun-Ki, SongKyu-Jeongc, ParkChan. Research on CeO₂ cap layer for YBCO-coated conductor[J]. 中国物理B, 2007, 16(7): 2142-2147.

Shi Dong-Qi(石东奇), Ma Ping(马平), Ko Rock-Kil, Kim Ho-Sup, Chung Jun-Ki, Song Kyu-Jeong, and Park Chan. Research on CeO₂ cap layer for YBCO-coated conductor[J]. Chinese Physics, 2007, 16(7): 2142-2147.

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Research on CeO₂ cap layer for YBCO-coated conductor

Research on CeO₂ cap layer for YBCO-coated conductor

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