Crack formation in epitaxial (110) thin films of YBa sub 2 Cu sub 3 O sub 7 minus. delta. and PrBa sub 2 Cu sub 3 O sub 7 minus x on (110)SrTiO sub 3 substrates

Journal Article · Mon Apr 15 04:00:00 EDT 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.105110· OSTI ID:5532208

Olsson, E; Gupta, A; Thouless, M D; Segmueller, A ^[1]; Clarke, D R ^[2]

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1. IBM Research Division, T.J. Watson Research Center, Yorktown Heights, New York 10598 (US)
2. Materials Department, University of California, Santa Barbara, California, 93106 (US)

A characteristic feature of epitaxial (110) thin films of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} and PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} on (110)SrTiO{sub 3} substrates is that the films have a tendency to crack along the (001) planes. We have studied the crack spacing as a function of deposition temperature and film thickness. The experimental data have been found to be in excellent agreement with a theoretical analysis of the crack spacings in brittle films. The study has allowed us to determine the critical thickness below which no cracks are expected to form as a function of temperature for (110) films of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}, PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}, and YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}/ PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} bilayers.

• OSTI ID: 5532208
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 58:15; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRACK PROPAGATION
CRACKS
DIMENSIONS
FILMS
OXIDES
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
SUPERCONDUCTING FILMS
TEMPERATURE DEPENDENCE
THICKNESS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES