a -axis oriented epitaxial YBa sub 2 Cu sub 3 O sub 7 minus x -PrBa sub 2 Cu sub 3 O sub 7 minus y heterostructures

Journal Article · Mon Dec 03 04:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.104179· OSTI ID:6195672

Inam, A; Rogers, C T; Ramesh, R; Remschnig, K; Farrow, L; Hart, D; Venkatesan, T; Wilkens, B ^[1]

---

1. Bellcore, Red Bank, NJ (USA)

We have grown YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}-PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital y}} heterostructures with the perovskite {ital a} axis normal to the surface of a variety of (001) oriented substrates using the pulsed laser deposition technique. X-ray diffraction studies indicate little or no formation of the traditional {ital c}-axis normal orientation usually nucleated on these substrates, while ion channeling, transmission electron microscopy (TEM), and Raman scattering studies reveal a highly ordered crystalline structure similar in quality to that obtained in the best {ital c}-axis oriented films. Superconducting transition temperatures, for current transport in the plane of the films, consistently exceed 80 K, but are probably lower than the optimum 92 K transition expected for YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} due to the presence of growth twin boundaries between grains with the {ital c} axis oriented along the two substrate directions.

• OSTI ID: 6195672
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 57:23; 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
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHANNELING
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL GROWTH
CRYSTAL STRUCTURE
DATA
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
EPITAXY
EXPERIMENTAL DATA
HETEROJUNCTIONS
HIGH-TC SUPERCONDUCTORS
INFORMATION
ION CHANNELING
JUNCTIONS
LASER SPECTROSCOPY
LOW TEMPERATURE
MICROSCOPY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RAMAN SPECTROSCOPY
RARE EARTH COMPOUNDS
SCATTERING
SEMICONDUCTOR JUNCTIONS
SPECTROSCOPY
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES