Superconducting properties of oriented YBa2Cu3O7-x films on MgO and SrTiO3 substrates

C. J. Haung*, Tseung-Yuen Tseng

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Using single-target sputter deposition, the c-axis oriented YBa2Cu3O7-x films can be obtained on both MgO and SrTiO3 substrates by appropriately controlling the substrate temperature at 700 °C. However, on examining a.c. susceptibility and electrical dissipation, we find that the films on a SrTiO3 substrate possess better superconducting properties, such as a stronger coupling between the superconducting grains; a higher potential energy for flux pinning; and a larger capacity for current conduction. Also, from the magnetization hysteresis measurement, the critical current density of 2.6 × 106 A cm-2 (77 K) and 4.5 × 107 A cm-2 (5 K) for the sample on the SrTiO3 substrate can be estimated.

Original languageEnglish
Pages (from-to)110-114
Number of pages5
JournalMaterials Chemistry and Physics
Volume34
Issue number2
DOIs
StatePublished - 1 Jan 1993

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