In situ growth and properties of single-crystalline-like La sub 2 minus x Sr sub x CuO sub 4 epitaxial films by off-axis sputtering (US)

Journal Article · Mon Nov 18 00:00:00 EST 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.105876· OSTI ID:5998672

Kao, H L; Kwo, J; Fleming, R M; Hong, M; Mannaerts, J P ^[1]

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1. AT T Bell Laboratories, Murray Hill, New Jersey (USA)

Excellent quality La{sub 2{minus}x}Sr{sub x}CuO{sub 4} epitaxial films of 0.07{le}{ital x}{le}0.34 in (001) and (103) orientations have been successfully grown {ital in} {ital situ} on SrTiO{sub 3}, LaAlO{sub 3}, and Y-stabilized ZrO{sub 2} substrates using 90{degree} off-axis sputtering. A record low ion channeling minimal yield {chi}{sub min} of 1.9% is observed for the first time, and a {chi}{sub min} of 3% is routinely attained. The surface exhibits a featureless morphology under high-resolution scanning electron microscope, suggesting a roughness {le}30--40 A. Superconductivity is maximized at Sr=0.15 with a typical {ital T}{sub {ital c}} ({ital R}=0) of 35 K, a {ital J}{sub {ital c}} (4.2 K) of 1--3{times}10{sup 6} A/cm{sup 2}, and a normal state resistivity two to three times lower than single crystals. {ital T}{sub {ital c}} shows a marked reduction with thickness, and the results are interpreted on the basis of partially relieved strained-layer growth coupled with a sensitive dependence of {ital T}{sub {ital c}} on uniaxial stress.

• OSTI ID: 5998672
• Journal Information: Applied Physics Letters; (United States), Vol. 59:21; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CUPRATES
CRYSTAL GROWTH
LANTHANUM OXIDES
STRONTIUM OXIDES
HIGH-TC SUPERCONDUCTORS
ION CHANNELING
MORPHOLOGY
QUATERNARY COMPOUNDS
SPUTTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
CHALCOGENIDES
CHANNELING
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
LANTHANUM COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication