Formation of artificially-layered high-temperature superconductors using pulsed-laser deposition

David P. Norton; B. C. Chakoumakos; D. H. Lowndes; J. D. Budai

doi:10.1016/0169-4332(95)00542-0

Formation of artificially-layered high-temperature superconductors using pulsed-laser deposition

David P. Norton, B. C. Chakoumakos, D. H. Lowndes, J. D. Budai

Single Crystal Diffraction

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Abstract

Superlattice structures, consisting of SrCuO ₂ , (Ca,Sr)CuO ₂ , and BaCuO ₂ layers in the tetragonal, 'infinite layer' crystal structure, have been grown by pulsed-laser deposition (PLD). Superlattice chemical modulation is observed for structures with component layers as thin as a single unit cell (∼ 3.4 Å), indicating that unit-cell control of (Ca,Sr)CuO ₂ growth is possible using conventional pulsed-laser deposition over a wide oxygen pressure regime. X-ray diffraction intensity oscillations, due to the finite thickness of the film, indicate that these films are extremely flat with a thickness variation of only ∼ 20 Å over a length scale of several thousand angstroms. Using the constraint of epitaxy to grow metastable cuprates in the infinite layer structure, novel high-temperature superconducting structural families have been formed. In particular, epitaxially-stabilized (Ca,Sr)CuO ₂ /BaCuO ₂ superlattices, grown by sequentially depositing on lattice-matched (100) SrTiO ₃ from BaCuO ₂ and (Ca,Sr)CuO ₂ ablation targets in a PLD system, show metallic conductivity and superconductivity at T _c (onset) ∼ 70 K. These results show that pulsed-laser deposition and epitaxial stabilization have been used to effectively 'engineer' artificially-layered thin-film materials.

Original language	English
Pages (from-to)	672-678
Number of pages	7
Journal	Applied Surface Science
Volume	96-98
DOIs	https://doi.org/10.1016/0169-4332(95)00542-0
State	Published - Apr 1996

Funding

We would like to thank P.H. Fleming for assistance with substrate preparation. This research was sponsored by the Division of Materials Sciences, U.S. Department of Energy under contract DE- AC05-840R21400 with Martin Marietta Energy Systems, Inc.

Funders	Funder number
U.S. Department of Energy	DE- AC05-840R21400
Division of Materials Sciences and Engineering

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@article{1a039ea02cad428db745d4f1cec79728,

title = "Formation of artificially-layered high-temperature superconductors using pulsed-laser deposition",

abstract = " Superlattice structures, consisting of SrCuO 2 , (Ca,Sr)CuO 2 , and BaCuO 2 layers in the tetragonal, 'infinite layer' crystal structure, have been grown by pulsed-laser deposition (PLD). Superlattice chemical modulation is observed for structures with component layers as thin as a single unit cell (∼ 3.4 {\AA}), indicating that unit-cell control of (Ca,Sr)CuO 2 growth is possible using conventional pulsed-laser deposition over a wide oxygen pressure regime. X-ray diffraction intensity oscillations, due to the finite thickness of the film, indicate that these films are extremely flat with a thickness variation of only ∼ 20 {\AA} over a length scale of several thousand angstroms. Using the constraint of epitaxy to grow metastable cuprates in the infinite layer structure, novel high-temperature superconducting structural families have been formed. In particular, epitaxially-stabilized (Ca,Sr)CuO 2 /BaCuO 2 superlattices, grown by sequentially depositing on lattice-matched (100) SrTiO 3 from BaCuO 2 and (Ca,Sr)CuO 2 ablation targets in a PLD system, show metallic conductivity and superconductivity at T c (onset) ∼ 70 K. These results show that pulsed-laser deposition and epitaxial stabilization have been used to effectively 'engineer' artificially-layered thin-film materials. ",

author = "Norton, {David P.} and Chakoumakos, {B. C.} and Lowndes, {D. H.} and Budai, {J. D.}",

year = "1996",

month = apr,

doi = "10.1016/0169-4332(95)00542-0",

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T1 - Formation of artificially-layered high-temperature superconductors using pulsed-laser deposition

AU - Norton, David P.

AU - Chakoumakos, B. C.

AU - Lowndes, D. H.

AU - Budai, J. D.

PY - 1996/4

Y1 - 1996/4

N2 - Superlattice structures, consisting of SrCuO 2 , (Ca,Sr)CuO 2 , and BaCuO 2 layers in the tetragonal, 'infinite layer' crystal structure, have been grown by pulsed-laser deposition (PLD). Superlattice chemical modulation is observed for structures with component layers as thin as a single unit cell (∼ 3.4 Å), indicating that unit-cell control of (Ca,Sr)CuO 2 growth is possible using conventional pulsed-laser deposition over a wide oxygen pressure regime. X-ray diffraction intensity oscillations, due to the finite thickness of the film, indicate that these films are extremely flat with a thickness variation of only ∼ 20 Å over a length scale of several thousand angstroms. Using the constraint of epitaxy to grow metastable cuprates in the infinite layer structure, novel high-temperature superconducting structural families have been formed. In particular, epitaxially-stabilized (Ca,Sr)CuO 2 /BaCuO 2 superlattices, grown by sequentially depositing on lattice-matched (100) SrTiO 3 from BaCuO 2 and (Ca,Sr)CuO 2 ablation targets in a PLD system, show metallic conductivity and superconductivity at T c (onset) ∼ 70 K. These results show that pulsed-laser deposition and epitaxial stabilization have been used to effectively 'engineer' artificially-layered thin-film materials.

AB - Superlattice structures, consisting of SrCuO 2 , (Ca,Sr)CuO 2 , and BaCuO 2 layers in the tetragonal, 'infinite layer' crystal structure, have been grown by pulsed-laser deposition (PLD). Superlattice chemical modulation is observed for structures with component layers as thin as a single unit cell (∼ 3.4 Å), indicating that unit-cell control of (Ca,Sr)CuO 2 growth is possible using conventional pulsed-laser deposition over a wide oxygen pressure regime. X-ray diffraction intensity oscillations, due to the finite thickness of the film, indicate that these films are extremely flat with a thickness variation of only ∼ 20 Å over a length scale of several thousand angstroms. Using the constraint of epitaxy to grow metastable cuprates in the infinite layer structure, novel high-temperature superconducting structural families have been formed. In particular, epitaxially-stabilized (Ca,Sr)CuO 2 /BaCuO 2 superlattices, grown by sequentially depositing on lattice-matched (100) SrTiO 3 from BaCuO 2 and (Ca,Sr)CuO 2 ablation targets in a PLD system, show metallic conductivity and superconductivity at T c (onset) ∼ 70 K. These results show that pulsed-laser deposition and epitaxial stabilization have been used to effectively 'engineer' artificially-layered thin-film materials.

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ER -

Formation of artificially-layered high-temperature superconductors using pulsed-laser deposition

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