Formation of artificially-layered superconducting materials by pulsed-laser deposition
- and others
Artificially-layered structures, consisting of (Sr,Ba,Ca)CuO{sub 2} layers in the tetragonal, {open_quotes}infinite layer{close_quotes} crystal structure, have been grown by pulsed-laser deposition. Superlattice chemical modulation is observed for structures with SrCuO{sub 2} and (Sr,Ca)CuO{sub 2} layers as thin as a single unit cell ({approximately}3.4 {Angstrom}). In addition, novel thin-film superconductors were formed by using the constraint of epitaxy to stabilize SrCuO{sub 2}/BaCuO{sub 2} superlattices in the infinite layer structure. Using this approach, two new structural families, Ba{sub 2}Sr{sub n-1}Cu{sub n+1} O{sub 2n+2+{gamma}} and Ba{sub 4}Sr{sub n-1}Cu{sub n+3}O{sub 2n+6+{gamma}}, have been synthesized which superconduct at temperatures as high as 70 K. These results represent not only the synthesis of new structural families of superconductors, but also demonstrate that pulsed-laser deposition and epitaxial stabilization can be effectively used to engineer artificially-layered thin-film materials.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 230374
- Report Number(s):
- CONF-941016--8; ON: DE96009389
- Country of Publication:
- United States
- Language:
- English
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