Properties of {ital YBa}{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thick films on flexible buffered metallic substrates
- Superconductivity Technology Center, Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
We report superconducting and mechanical properties of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (YBCO) thick films on Ni-based alloys with a textured yttria-stabilized zirconia (YSZ) buffer layer. The YBCO and YSZ layers were deposited by pulsed laser deposition and ion beam assisted deposition, respectively. It was found that the transport critical current density ({ital J}{sub {ital c}}) correlates very well with the YBCO mosaic spread. {ital J}{sub {ital c}} over 1{times}10 {sup 6} A/cm{sup 2} at 75 K and {similar_to}1{times}10{sup 7} A/cm{sup 2} at 4 K were obtained in the 1-{mu}m thick YBCO films. Zero field critical current of 120 amps at 75 K was obtained in a 2-{mu}m-thick and 1-cm-wide YBCO film. Angular dependence measurement revealed {ital J}{sub {ital c}} peaks for both {ital H}{parallel}{ital c} and {ital H}{parallel}{ital a}-{ital b}. The peak for {ital H}{parallel}{ital c} implies additional pinning due to defects such as small angle grain boundaries or twin boundaries. Bending tests at 75 K showed that the YBCO thick films on the metallic substrates could sustain a strain of 0.4% and over 1% for tension and compression, respectively. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- OSTI ID:
- 118389
- Journal Information:
- Applied Physics Letters, Vol. 67, Issue 16; Other Information: PBD: 16 Oct 1995
- Country of Publication:
- United States
- Language:
- English
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