Crystal structure, microstructure, surface morphology, and transport properties of Er[sub 5]Ba[sub 7]Cu[sub 12]O[sub [ital y]] high-temperature-superconductor thin films

Journal Article · Fri Oct 01 00:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.9697· OSTI ID:5986868

Choudhary, K M; Seshadri, P; Bae, J; Black, M ^[1]; Lewicki, A ^[2]

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1. Department of Electrical Engineering, Materials Science and Engineering Program, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
2. Department of Physics, Purdue University, West Lafayette, Indiana 47907 (United States)

Er[sub 5]Ba[sub 7]Cu[sub 12]O[sub [ital y]] is a thin-film high-temperature superconductor (critical transition temperature, [ital T][sub [ital c]]=93 K). The crystal structure, microstructure, surface morphology, and transport properties of Er[sub 5]Ba[sub 7]Cu[sub 12]O[sub [ital y]] thin films were investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM), and four-point dc-resistivity measurements under magnetic fields. Oriented Er[sub 5]Ba[sub 7]Cu[sub 12]O[sub [ital y]] thin films on cubic ZrO[sub 2](100), MgO(100), LaAlO[sub 3](100), and SrTiO[sub 3](100) substrates were prepared by molecular-beam deposition and post annealing in wet and dry O[sub 2] (BaF[sub 2] technique; annealing temperature =850--890 [degree]C). The 0.4-[mu]m Er[sub 5]Ba[sub 7]Cu[sub 12]O[sub [ital y]] thin films on cubic ZrO[sub 2](100) and MgO(100) substrates grew with mixed [ital b] and [ital c] orientations. The 0.4-[mu]m Er[sub 5]Ba[sub 7]Cu[sub 12]O[sub [ital y]] thin films on LaAlO[sub 3](100) and SrTiO[sub 3](100) substrates annealed at 850 [degree]C had [ital c]- and [ital a]-oriented grains, whereas the films annealed in the temperature range 870--890 [degree]C displayed (001) epitaxy.

• DOE Contract Number: FG02-90ER45427
• OSTI ID: 5986868
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 48:13; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
ELECTRIC CONDUCTIVITY
COPPER OXIDES
ERBIUM OXIDES
ACTIVATION ENERGY
CRYSTAL STRUCTURE
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MICROSTRUCTURE
SUPERCONDUCTING FILMS
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRICAL PROPERTIES
ENERGY
ERBIUM COMPOUNDS
FILMS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
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