Superconducting and Structural Properties of EuBa2Cu3O7-δ Ultrathin Films Deposited on MgO(100) Substrates Using Magnetron Sputtering
- 1 February 1990
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 29 (2A), L298
- https://doi.org/10.1143/jjap.29.l298
Abstract
EuBa2Cu3O7-δ thin films were produced on MgO(100) substrates at 580°C using planar-type magnetron sputtering and were studied by X-ray diffraction and RHEED. The c-oriented films were epitaxially grown with a crystal orientation of [110]EuBaCuO//[010]MgO. Films more than 1000 Å thick exhibited T c endpoints of ∼90 K. As film thickness decreased, superconducting properties deteriorated. However, even films with 2-unit-cell thickness became superconducting. The cause of the deterioration of superconducting properties in ultrathin films is discussed on the basis of the relationship between lattice matching and structural properties.Keywords
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