Misfit dislocations in superconducting thin films on SrTiO3{010}

J. Narayan; S. Sharan; R. K. Singh; K. Jagannadham

doi:10.1016/0921-5107(89)90009-3

Misfit dislocations in superconducting thin films on SrTiO₃{010}

J. Narayan, S. Sharan, R. K. Singh, K. Jagannadham

North Carolina State University

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We have studied the nature of strain-induced dislocations during epitaxial growth of YBa₂Cu₃-O_7-δ films on SrTiO₃{010} substrate. From the contrast analysis under different diffraction vectors, it was determined that the dislocations of a[110] and [011] Burgers vectors are formed in (110) and (011) planes respectively. At the points of intersection, they react (a[110]+a[011]→a[101]) to form a[101] segments in (010) planes. We have analyzed the formation of dislocations near the free surface above a critical thickness to minimize the total energy of the system. The dislocations glide into the film and the substrate. The importance of these results in the fabrication of thin film superconducting devices is emphasized.

Original language	English
Pages (from-to)	333-337
Number of pages	5
Journal	Materials Science and Engineering B
Volume	2
Issue number	4
DOIs	https://doi.org/10.1016/0921-5107(89)90009-3
State	Published - Apr 1989
Externally published	Yes

Funding

Part of this research is sponsored by the Office of Energy Systems Research, Division of Energy Conversion and Utilization Technologies (ECUT) programs under Subcontract 19X-4337C, U.S. Department of Energy, Martin Marietta Energy Systems Inc., Oak Ridge National Laboratories, and National Science Foundation Project 8618735.

Funders	Funder number
Division of Energy Conversion and Utilization Technologies
ECUT
Office of Energy Systems Research
National Science Foundation	8618735
U.S. Department of Energy
Oak Ridge National Laboratory

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abstract = "We have studied the nature of strain-induced dislocations during epitaxial growth of YBa2Cu3-O7-δ films on SrTiO3{010} substrate. From the contrast analysis under different diffraction vectors, it was determined that the dislocations of a[110] and [011] Burgers vectors are formed in (110) and (011) planes respectively. At the points of intersection, they react (a[110]+a[011]→a[101]) to form a[101] segments in (010) planes. We have analyzed the formation of dislocations near the free surface above a critical thickness to minimize the total energy of the system. The dislocations glide into the film and the substrate. The importance of these results in the fabrication of thin film superconducting devices is emphasized.",

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Misfit dislocations in superconducting thin films on SrTiO₃{010}

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