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Yttrium oxide inclusions in YBa2Cu3Ox thin films : Enhanced flux pinning and relation to copper oxide surface particles

Selinder, T.I. ; Helmersson, Ulf ; Han, Z. ; Sundgren, J.E. ; Sjöström, H. and Wallenberg, LR LU (1992) In Physica C: Superconductivity and its Applications 202(1-2). p.69-74
Abstract
Semi-coherent Y2O3 (yttria) inclusions are identified in high quality epitaxial YBa2Cu3Ox (YBCO) thin films by using transmission electron microscopy and energy dispersive X-ray analyses. Magnetization measurements show enhanced flux pinning in films containing an increasing number density of inclusions. The inclusions are incorporated into the films without disturbing the YBCO structure appreciably. The number density is ≈ 1017 cm-3 in films having transport critical currents of 4x106 A cm-2 at 77 K. Nucleation of the yttria inclusions is suggested to occur spontaneously during film growth. The abundance of yttria inclusions is connected to the occurrence of large Cu-rich surface particles in films that have optimum superconducting... (More)
Semi-coherent Y2O3 (yttria) inclusions are identified in high quality epitaxial YBa2Cu3Ox (YBCO) thin films by using transmission electron microscopy and energy dispersive X-ray analyses. Magnetization measurements show enhanced flux pinning in films containing an increasing number density of inclusions. The inclusions are incorporated into the films without disturbing the YBCO structure appreciably. The number density is ≈ 1017 cm-3 in films having transport critical currents of 4x106 A cm-2 at 77 K. Nucleation of the yttria inclusions is suggested to occur spontaneously during film growth. The abundance of yttria inclusions is connected to the occurrence of large Cu-rich surface particles in films that have optimum superconducting properties. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physica C: Superconductivity and its Applications
volume
202
issue
1-2
pages
6 pages
publisher
Elsevier
external identifiers
  • scopus:0026954407
ISSN
0921-4534
DOI
10.1016/0921-4534(92)90297-P
language
English
LU publication?
yes
id
ea02c065-9e10-4ac9-a973-115a1e673e7e
date added to LUP
2023-10-31 15:04:44
date last changed
2025-04-04 14:13:58
@article{ea02c065-9e10-4ac9-a973-115a1e673e7e,
  abstract     = {{Semi-coherent Y2O3 (yttria) inclusions are identified in high quality epitaxial YBa2Cu3Ox (YBCO) thin films by using transmission electron microscopy and energy dispersive X-ray analyses. Magnetization measurements show enhanced flux pinning in films containing an increasing number density of inclusions. The inclusions are incorporated into the films without disturbing the YBCO structure appreciably. The number density is ≈ 1017 cm-3 in films having transport critical currents of 4x106 A cm-2 at 77 K. Nucleation of the yttria inclusions is suggested to occur spontaneously during film growth. The abundance of yttria inclusions is connected to the occurrence of large Cu-rich surface particles in films that have optimum superconducting properties.}},
  author       = {{Selinder, T.I. and Helmersson, Ulf and Han, Z. and Sundgren, J.E. and Sjöström, H. and Wallenberg, LR}},
  issn         = {{0921-4534}},
  language     = {{eng}},
  month        = {{11}},
  number       = {{1-2}},
  pages        = {{69--74}},
  publisher    = {{Elsevier}},
  series       = {{Physica C: Superconductivity and its Applications}},
  title        = {{Yttrium oxide inclusions in YBa2Cu3Ox thin films : Enhanced flux pinning and relation to copper oxide surface particles}},
  url          = {{http://dx.doi.org/10.1016/0921-4534(92)90297-P}},
  doi          = {{10.1016/0921-4534(92)90297-P}},
  volume       = {{202}},
  year         = {{1992}},
}