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Studies of the frequency dependence of the microwave surface resistance of high Tc superconducting films using a new superconducting split ring resonator Gowe, Bruce T.
Abstract
A new superconducting split-ring resonator has been developed for use in perturbation measurements of the microwave surface resistance of thin superconducting films. The experimental setup allowed for the sample temperature to be ramped from 10 - 120 K during the measurement. The split ring arrangement was such that it could be adjusted from run to run to operate at a variety of frequencies thus making the apparatus well suited to exploring the frequency dependence of the film's losses. Results from measurements on Tl2Ba2CaCu20y films with this resonator at 910 MHz, 1.4 GHz and 2.4 GHz in conjunction with results from an earlier split-ring resonator at 3.7 GHz [1] suggest that the losses are not consistent with an UJ2 relationship below 2.4 GHz. Operating at 910 MHz, surface resistances as low as 5/J.Q were easily resolved with perturbations from an unloaded quality factor of 2xl06 . The 2.4 GHz configuration had a resolution of ILIQ in surface resistance.
Item Metadata
| Title |
Studies of the frequency dependence of the microwave surface resistance of high Tc superconducting films using a new superconducting split ring resonator
|
| Creator | |
| Publisher |
University of British Columbia
|
| Date Issued |
1997
|
| Description |
A new superconducting split-ring resonator has been developed for use in perturbation
measurements of the microwave surface resistance of thin superconducting films. The
experimental setup allowed for the sample temperature to be ramped from 10 - 120 K
during the measurement. The split ring arrangement was such that it could be adjusted
from run to run to operate at a variety of frequencies thus making the apparatus well
suited to exploring the frequency dependence of the film's losses. Results from measurements
on Tl2Ba2CaCu20y films with this resonator at 910 MHz, 1.4 GHz and 2.4 GHz in
conjunction with results from an earlier split-ring resonator at 3.7 GHz [1] suggest that
the losses are not consistent with an UJ2 relationship below 2.4 GHz. Operating at 910
MHz, surface resistances as low as 5/J.Q were easily resolved with perturbations from an
unloaded quality factor of 2xl06 . The 2.4 GHz configuration had a resolution of ILIQ in
surface resistance.
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| Extent |
9422869 bytes
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| Genre | |
| Type | |
| File Format |
application/pdf
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| Language |
eng
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| Date Available |
2009-03-25
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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| DOI |
10.14288/1.0087800
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| URI | |
| Degree | |
| Program | |
| Affiliation | |
| Degree Grantor |
University of British Columbia
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| Graduation Date |
1997-11
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| Campus | |
| Scholarly Level |
Graduate
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| Aggregated Source Repository |
DSpace
|
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Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.