Growth and properties of ultrathin YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} layers
We report on the superconducting properties of ultrathin c-axis-oriented YBa{sub 2}CU{sub 3}0{sub 7-8} (YBCO) layers grown by pulsed-laser deposition. For single YBCO layers embedded in a PrBa{sub 2}Cu{sub 3}O{sub 7-8} matrix, with a YBCO layer thickness as small as one unit cell, there is evidence of a superconducting transition. We also find that the superconducting properties of ultrathin YBCO layers can be significantly enhanced by use of more conductive buffer and cap layers. In particular, Pr{sub 0.5}Ca{sub 0.5}Ba{sub 2}Cu{sub 3}O{sub 7-8}/YBCO/Pr{sub 0.5}Ca{sub 0.5}Ba{sub 2}Cu{sub 3}O{sub 7-8} ultrathin structures have transport properties superior to PrBa{sub 2}Cu{sub 3}O{sub 7-8}/YBCO/PrBa{sub 2}Cu{sub 3}O{sub 7-8} including an increase in {Tc} and a narrower superconducting transition.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10178718
- Report Number(s):
- CONF-920944--1; ON: DE93001210
- Country of Publication:
- United States
- Language:
- English
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