Modeling of the microwave surface impedance of current biased YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thin films
- Department of Microwave Technology, Chalmers University of Technology, S-412 96 Goeteborg (Sweden)
A theoretical and experimental investigation is made of the surface impedance of dc current biased high-quality epitaxial YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thin films using a coplanar resonator technique. The isotropic Ginzburg-Landau theory and a current-dependent coupled-grain model are used to model the resonant frequency shift and the change in unloaded quality factor Q{sub 0} due to the bias current. Good quantitative agreement is obtained between the two models and the measured resonant frequency shift. The change in Q{sub 0}, determined from measurements, can be explained by the coupled-grain model. The Ginzburg-Landau theory predicts a change in Q{sub 0} which is several times less than given by measurements. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 435103
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 1 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Correlations between film properties and microwave surface resistance for YBa sub 2 Cu sub 3 O sub 7 minus. delta. thin films on MgO
Pair-breaking effect of high current densities on the superconducting transition in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]]
Proton radiation effects in microwave cavities and ring resonators fabricated from YBa sub 2 Cu sub 3 O sub 7 minus. delta
Journal Article
·
Tue Oct 01 00:00:00 EDT 1991
· Journal of Applied Physics; (United States)
·
OSTI ID:5172519
Pair-breaking effect of high current densities on the superconducting transition in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]]
Journal Article
·
Sun Jan 30 23:00:00 EST 1994
· Physical Review Letters; (United States)
·
OSTI ID:5185690
Proton radiation effects in microwave cavities and ring resonators fabricated from YBa sub 2 Cu sub 3 O sub 7 minus. delta
Journal Article
·
Mon Apr 08 00:00:00 EDT 1991
· Applied Physics Letters; (USA)
·
OSTI ID:5731415