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Preparation of Sm1−xCaxBiO3 buffer layers for coated conductor by polymer-assisted chemical solution deposition

Research paper by Xin Zhang, Zhiwei Wen, Bai Sun, Jinfang Peng, C.H. Cheng, Yong Zhang, Yudong Xia, Chuan Ke, Yong Zhao

Indexed on: 08 Dec '16Published on: 05 Dec '16Published in: Journal of Alloys and Compounds



Abstract

Potential Sm1−xCaxBiO3 (x = 0.1, 0.2, 0.3, and 0.4) buffer layers for REBa2Cu3O7−x(REBCO, RE = Y or Nd, Sm, Gd, Dy, etc) coated conductors (CCS) has been deposited on (00l) LaAlO3 substrate via a self-developed polymer-assisted chemical solution deposition (PA-CSD) route, and then studied by XRD, SEM, AFM and current-voltage (I–V) characteristics. Highly c-axis oriented, dense, smooth and crack-free buffer layers have been obtained. We found that its resistivity does not decrease obviously. The pseudo-cubic lattice parameter of Sm1−xCaxBiO3 matches well with the in-plan lattice parameters of corresponding REBCO compounds. YBCO superconducting epitaxial film with high performance is successfully deposited on Sm0.6Ca0.4BiO3 layer by dc sputtering. Our results offer a new avenue to search for better lattice matched buffer layer for CCS, particularly to REBCO.

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