Superconducting NdBa2Cu3O7-δ thin films grown on bare (11̄02) sapphire by pulsed laser deposition

T. Y. Cheng*, P. I. Lin, S. F. Chen, S. J. Liu, Jenh-Yih Juang, Jiunn-Yuan Lin, Kaung-Hsiung Wu, T. M. Uen, Y. S. Gou, R. L. Wang, H. C. Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Superconducting NdBa2 Cu3 O7-δ (NBCO) thin films with Tc=89 K have been successfully grown on bare (11 02) sapphire substrates by pulsed laser deposition (PLD). The X-ray diffraction results show that the as-grown NBCO films are all c-axis oriented with no observable second phase. The c-axis parameter decreases monotonically with increasing the deposition temperature (Ts), suggesting that the corresponding degradation of Tc for Ts> 790 °C might not originate from oxygen deficiency. It is conceived that the film-substrate reaction that occurring at the interface may cause Ba-deficiency and hence enhance Nd-Ba antisite substitutions.

Original languageAmerican English
Pages (from-to)557-562
Number of pages6
JournalJournal of Low Temperature Physics
Volume131
Issue number3-4
DOIs
StatePublished - 1 May 2003

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