Dielectric and optical properties of substrates for high-temperature superconductor films
- 17 June 1991
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 58 (24) , 2741-2743
- https://doi.org/10.1063/1.104772
Abstract
The dielectric constants ε of LaAlO3, NdGaCO3 and MgO substrates were measured using a dielectric filled resonant cavity. Precise values of ε were obtained for NdGaO3 and MgO. An inhomogeneous dielectric constant was observed for LaAlO3. Optical studies indicated that the extensive twinning in this material was the source of the inhomogeneity.Keywords
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