Formation of artificially-layered superconducting materials by pulsed-laser deposition

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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 ... continued below

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10 p.

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Norton, D.P.; Chakoumakos, B.C. & Budai, J.D. September 1, 1994.

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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.

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10 p.

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OSTI as DE96009389

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  • Materials week `94, Rosemont, IL (United States), 3-7 Oct 1994

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  • Other: DE96009389
  • Report No.: CONF-941016--8
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 230374
  • Archival Resource Key: ark:/67531/metadc673054

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  • September 1, 1994

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  • June 29, 2015, 9:42 p.m.

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  • Jan. 22, 2016, 11:05 a.m.

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Norton, D.P.; Chakoumakos, B.C. & Budai, J.D. Formation of artificially-layered superconducting materials by pulsed-laser deposition, article, September 1, 1994; Tennessee. (digital.library.unt.edu/ark:/67531/metadc673054/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.