CaNdAlO4 perovskite substrate for microwave and far-infrared applications of epitaxial high T c superconducting thin films
- 6 August 1990
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 57 (6) , 632-634
- https://doi.org/10.1063/1.104250
Abstract
Single‐crystal perovskite calcium‐neodymium aluminate CaNdAlO4 has been grown and tested as a substrate material for high Tc superconducting thin films. The material is chemically stable, can be fabricated into the form of large, twin‐free wafers, permits deposition of epitaxial Y‐Ba‐Cu‐O and Bi‐Sr‐Ca‐Cu‐O films, and exhibits low dielectric permittivity (ε≂20) and very low losses (tan δ≂10−3 at 100 K) at sub‐THz frequencies. Its high potential in microwave applications of thin‐film high Tc superconductors is clearly demonstrated.Keywords
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