SYNTHESIS AND MICROWAVE CHARACTERIZATION OF DC SPUTTERED TL-BA-CA-CU-O THIN-FILMS
Single and double sided superconducting Tl-Ba-Ca-Cu-O thin films (2 μm thick) have been prepared on MgO (100) and LaA1O3 (100) substrates by DC sputtering followed by a two step anneal process. Films produced have Tc between 90 and 110 K with transport critical current densities typically 103 to 105...
| Main Authors: | , , , , , |
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| Format: | Conference item |
| Published: |
1993
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| Summary: | Single and double sided superconducting Tl-Ba-Ca-Cu-O thin films (2 μm thick) have been prepared on MgO (100) and LaA1O3 (100) substrates by DC sputtering followed by a two step anneal process. Films produced have Tc between 90 and 110 K with transport critical current densities typically 103 to 105 A cm-2. Surface resistance (Rs) measurements at 50 GHz and 60 GHz over the temperature range 18-200 K have been made using a TE01 mode cavity end wall replacement technique giving Rs of 380 mΩ at 50 GHz. and 77 K. Preliminary results for patterned resonator structures show an improvement in Q over silver at 3.2 GHz and 77 K. |
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