Epitaxial Y sub 1 Ba sub 2 Cu sub 3 O sub 7 minus y /Y sub 1 minus x Pr sub x Ba sub 2 Cu sub 3 O sub 7 minus y heterostructures

Journal Article · Mon Jan 22 04:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.103291· OSTI ID:7034714

Venkatesan, T; Inam, A; Dutta, B; Ramesh, R; Hegde, M S; Wu, X D; Nazar, L; Chang, C C; Barner, J B; Hwang, D M; Rogers, C T ^[1]

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1. Bellcore, Red Bank, New Jersey 07701 (US)

For a variety of device applications, junction devices in particular, we have demonstrated a heterostructure system of Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{ital y}}/Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{ital y}} which maintains epitaxy over the entire Pr composition range {ital x}=0--1. We have grown both trilayer and multiperiod superlattices which show nearly single crystalline helium ion backscattering minimum yields of {lt}6% in the topmost layer. X-ray diffraction measurements indicate {ital c}-axis orientation by a transverse scan across (005) line with a full width at half maximum of 0.6{degree} and 0.4{degree} on MgO and SrTiO{sub 3} substrates, respectively. Scanning Auger electron depth profiles and cross-sectional transmission electron micrographs indicate abrupt Pr/Y interfaces within one unit cell and virtually no disruption of the layered structure at the interface. These results indicate the potential for the growth of excellent heterostructures and superlattices of the high-temperature superconductors.

• OSTI ID: 7034714
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 56:4; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
AUGER ELECTRON SPECTROSCOPY
BACKSCATTERING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL COMPOSITION
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
EPITAXY
EXPERIMENTAL DATA
FILMS
HELIUM IONS
HETEROJUNCTIONS
INFORMATION
INTERFACES
IONS
JUNCTIONS
LOW TEMPERATURE
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MICROSCOPY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
SCANNING ELECTRON MICROSCOPY
SCATTERING
SEMICONDUCTOR JUNCTIONS
SPECTROSCOPY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
SUPERLATTICES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES