LaNiO{sub 3} buffer layers for high critical current density YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} and Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8{minus}{delta}} films
We demonstrate high critical current density superconducting films of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (YBCO) and Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8{minus}{delta}} (Tl-2212) using LaNiO{sub 3} (LNO) buffer layers. YBCO films grown on an LNO buffer layer have only a slightly lower J{sub c} (5 K, H=0) than films grown directly on a bare LaAlO{sub 3} substrate. YBCO films grown on LNO buffer layers exhibit minor microstructural disorder and enhanced flux pinning. LNO-buffered Tl-2212 samples show large reductions in J{sub c} at all temperatures and fields compared to those grown on bare LaAlO{sub 3}, correlating to both {ital a}-axis grain and nonsuperconducting phase formation. LNO could be a promising buffer layer for both YBCO and Tl-based superconducting films in coated conductor applications. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 686840
- Journal Information:
- Applied Physics Letters, Vol. 75, Issue 16; Other Information: PBD: Oct 1999
- Country of Publication:
- United States
- Language:
- English
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66 PHYSICS
YTTRIUM COMPOUNDS
THALLIUM COMPOUNDS
CALCIUM COMPOUNDS
BARIUM COMPOUNDS
LANTHANUM COMPOUNDS
MAGNETIC FLUX
HIGH-TC SUPERCONDUCTORS
YTTRIUM OXIDES
BARIUM OXIDES
COPPER OXIDES
THALLIUM OXIDES
CALCIUM OXIDES
LANTHANUM OXIDES
NIOBATES
CRITICAL CURRENT
SUPERCONDUCTING FILMS
LAYERS
TEXTURE