Electrically tunable coplanar transmission line resonators using YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}/SrTiO{sub 3} bilayers

Journal Article · Mon Jun 26 00:00:00 EDT 1995 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.114137· OSTI ID:69033

Findikoglu, A T; Jia, Q X; Campbell, I H; Wu, X D ^[1]; Reagor, D; Mombourquette, C B; McMurry, D ^[2]

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1. Superconductivity Technology Center, Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Electronic Materials and Device Research, Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We have prepared electrically tunable microwave resonators incorporating superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} (YBCO) and paraelectric SrTiO{sub 3} (STO) layers on LaAlO{sub 3} substrates. The top YBCO layer for each sample was patterned into a 8 mm long coplanar transmission line with a 40 {mu}m gap and a 20 {mu}m center line width. The microwave transmission through the coplanar transmission line exhibits resonances corresponding to standing microwaves along the coplanar transmission line. These resonances are modulated by applying a bias voltage between the center line and the ground planes. Samples with a 0.5 {mu}m thick (2 {mu}m thick) bottom STO layer show, for a resonance at around 8 GHz (5 GHz), a frequency modulation of about 4% (24%) and a quality factor {ital Q} of about 200 (50) under 100 V bias at 80 K. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 69033
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 66; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
FREQUENCY MODULATION
HIGH-TC SUPERCONDUCTORS
LAYERS
MICROWAVE RADIATION
POWER TRANSMISSION LINES
RESONATORS
STRONTIUM OXIDES
SUPERCONDUCTING DEVICES
TUNING
YTTRIUM OXIDES