Thin Film Bao.6Ko.4Bi03 Microwave Devices

R. A. Schweinfurth; D. J. Van Harlingen; J. Kruse; J. Laskar; M. Feng; C. E. Platt; M. R. Teepe

doi:10.1109/77.233367

Thin Film Bao.6Ko.4Bi03 Microwave Devices

R. A. Schweinfurth, D. J. Van Harlingen, J. Kruse, J. Laskar, M. Feng, C. E. Platt, M. R. Teepe

Research output: Contribution to journal › Comment/debate › peer-review

Abstract

We have fabricated and tested microwave structures utilizing superconducting thin films of Ba_0.6K_0.4BiO₃ (BKBO). A high quality BKBO thin film (T_c > 28K, J_c > 1MA/cm²) grown by pulsed laser deposition on a (100) MgO substrate was patterned into a resonator and coplanar waveguide (CPW) transmission line. The 2.5 mm coplanar transmission line had an insertion loss of -2.1dB at 20GHz and 21K. The resonator showed an unloaded Q (quality factor) of 230 at 15K and 15.8GHz. We were only able to infer that the surface impedance (R_s) ≤ 34mΩ at 15K, since the resonator was limited by radiation losses rather than conductor losses.

Original language	English (US)
Pages (from-to)	1559-1562
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	3
Issue number	1
DOIs	https://doi.org/10.1109/77.233367
State	Published - Mar 1993

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/77.233367

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title = "Thin Film Bao.6Ko.4Bi03 Microwave Devices",

abstract = "We have fabricated and tested microwave structures utilizing superconducting thin films of Ba0.6K0.4BiO3 (BKBO). A high quality BKBO thin film (Tc > 28K, Jc > 1MA/cm2) grown by pulsed laser deposition on a (100) MgO substrate was patterned into a resonator and coplanar waveguide (CPW) transmission line. The 2.5 mm coplanar transmission line had an insertion loss of -2.1dB at 20GHz and 21K. The resonator showed an unloaded Q (quality factor) of 230 at 15K and 15.8GHz. We were only able to infer that the surface impedance (Rs) ≤ 34mΩ at 15K, since the resonator was limited by radiation losses rather than conductor losses.",

author = "Schweinfurth, {R. A.} and {Van Harlingen}, {D. J.} and J. Kruse and J. Laskar and M. Feng and Platt, {C. E.} and Teepe, {M. R.}",

note = "Funding Information: Manuscript received August 24, 1992. This work was funded by the Science and Technology Center for High Temperature Superconductivity under Grant STC-9 1-70000. Facilities and capabilities were also provided by the Materials Research Laboratory and the Microelectronics Laboratory at the University",

year = "1993",

month = mar,

doi = "10.1109/77.233367",

language = "English (US)",

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T1 - Thin Film Bao.6Ko.4Bi03 Microwave Devices

AU - Schweinfurth, R. A.

AU - Van Harlingen, D. J.

AU - Kruse, J.

AU - Laskar, J.

AU - Feng, M.

AU - Platt, C. E.

AU - Teepe, M. R.

N1 - Funding Information: Manuscript received August 24, 1992. This work was funded by the Science and Technology Center for High Temperature Superconductivity under Grant STC-9 1-70000. Facilities and capabilities were also provided by the Materials Research Laboratory and the Microelectronics Laboratory at the University

PY - 1993/3

Y1 - 1993/3

N2 - We have fabricated and tested microwave structures utilizing superconducting thin films of Ba0.6K0.4BiO3 (BKBO). A high quality BKBO thin film (Tc > 28K, Jc > 1MA/cm2) grown by pulsed laser deposition on a (100) MgO substrate was patterned into a resonator and coplanar waveguide (CPW) transmission line. The 2.5 mm coplanar transmission line had an insertion loss of -2.1dB at 20GHz and 21K. The resonator showed an unloaded Q (quality factor) of 230 at 15K and 15.8GHz. We were only able to infer that the surface impedance (Rs) ≤ 34mΩ at 15K, since the resonator was limited by radiation losses rather than conductor losses.

AB - We have fabricated and tested microwave structures utilizing superconducting thin films of Ba0.6K0.4BiO3 (BKBO). A high quality BKBO thin film (Tc > 28K, Jc > 1MA/cm2) grown by pulsed laser deposition on a (100) MgO substrate was patterned into a resonator and coplanar waveguide (CPW) transmission line. The 2.5 mm coplanar transmission line had an insertion loss of -2.1dB at 20GHz and 21K. The resonator showed an unloaded Q (quality factor) of 230 at 15K and 15.8GHz. We were only able to infer that the surface impedance (Rs) ≤ 34mΩ at 15K, since the resonator was limited by radiation losses rather than conductor losses.

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JO - IEEE Transactions on Applied Superconductivity

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Thin Film Bao.6Ko.4Bi03 Microwave Devices

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