Microwave properties of EuBa2Cu3O7−x thin films on MgO
- 24 June 1991
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 58 (25) , 2981-2983
- https://doi.org/10.1063/1.104688
Abstract
We have measured the microwave surface resistance of sputtered EuBa2Cu3O7−x superconducting films on MgO in a gold‐plated Invar host cavity at 50 GHz. Low surface resistance of 2 mΩ was achieved even at 77 K and 50 GHz for highly c‐axis oriented films with good in‐plane epitaxy together with a Tc of 93 K and a Jc of 1.4×106 A/cm2 at 90 K. This surface resistance value is slightly lower than that for a classical superconductor of Nb at the same frequency at the same reduced temperature (T/Tc) of 7.7 K.Keywords
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