Preparation and properties of YBa2Cu3O7-x thin films on LaAlO3 by pulsed excimer laser ablation

M. E. Geusic, W. J. Weber, L. R. Pederson

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Epitaxial YBa2Cu3O7-x thin films were grown on (100)-LaAlO3 substrates by pulsed excimer laser ablation (308 nm) using a rotating YBa2Cu3O7-x target. Principally c-axis oriented, the films exhibited a midpoint Tc of 88.5 K with a 3 K transition width (10-90%). Transport critical current densities, measured in zero applied field on 100 μn wide microbridges, were 1.25× 106 A/cm2 at 77 K and reached 4.7× 106 A/cm2 at 10 K. Critical current densities at temperatures near Tc (77 to 88 K) were proportional to (1 - T Tc)n, with n≈ 1.5, in reasonable agreement with the expected Ginzburg-Landau dependence for thin films near Tc. The value n≈1.5 implies that a superconductor-normal-metal-insulator-superconductor (S-N-I-S) tunneling junction is formed at the grain boundaries in these films.

Original languageEnglish
Pages (from-to)13-16
Number of pages4
JournalMaterials Letters
Volume10
Issue number1-2
DOIs
Publication statusPublished - 1990
Externally publishedYes

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Excimer lasers
Laser ablation
Pulsed lasers
excimer lasers
Superconducting materials
laser ablation
pulsed lasers
critical current
current density
Thin films
preparation
thin films
Grain boundaries
grain boundaries
Metals
insulators
Substrates
metals
Temperature
temperature

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Preparation and properties of YBa2Cu3O7-x thin films on LaAlO3 by pulsed excimer laser ablation. / Geusic, M. E.; Weber, W. J.; Pederson, L. R.

In: Materials Letters, Vol. 10, No. 1-2, 1990, p. 13-16.

Research output: Contribution to journalArticle

Geusic, M. E. ; Weber, W. J. ; Pederson, L. R. / Preparation and properties of YBa2Cu3O7-x thin films on LaAlO3 by pulsed excimer laser ablation. In: Materials Letters. 1990 ; Vol. 10, No. 1-2. pp. 13-16.
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