Growth and structural analysis of GdBa sub 2 Cu sub 3 O sub 7 superconducting thin films on MgO single-crystal substrates

Journal Article · Mon Oct 28 04:00:00 EST 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.106056· OSTI ID:5192676

Yi, H R; Li, H C ^[1]; Wang, R L; Li, J W; Wang, C A; Li, L ^[2]; Jia, Y B ^[3]; Zhao, Z X ^[4]

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1. Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100080, People's Republic of China, and Structure Research Laboratory, University of Science and Technology of China, Hefei 230026 (People's Republic of China)
2. Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100080 (People's Republic of China)
3. Structure Research Laboratory, University of Science Technology of China, Hefei 230026 (People's Republic of China)
4. National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100080 (People's Republic of China)

Thin films of GdBa{sub 2}Cu{sub 3}O{sub 7} superconductor were grown {ital in} {ital situ} on MgO single-crystal substrates under different substrate temperatures ({ital T}{sub {ital s}}). When {ital T}{sub {ital s}}=800 {degree}C, the films were epitaxially grown with the {ital c} axis perpendicular to the film surface. The growth quality was very good, but the zero resistance critical temperature ({ital T}{sub {ital c}0}) was only 85 K and the transition width ({Delta}{ital T}{sub {ital c}}) was 1.5 K. When {ital T}{sub {ital s}}=670 {degree}C, some of the films were epitaxially grown with the {ital c} axis perpendicular to the film surface. Some were mainly {ital c} axis oriented with a small amount of (110) and {ital a}-axis orientation. The growth quality was relatively poor, but they had {ital T}{sub {ital c}0} of 89--91 K and {Delta}{ital T}{sub {ital c}} of 0.6--1 K.

• OSTI ID: 5192676
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 59:18; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

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