1992
DOI: 10.1109/77.182735
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Effective and intrinsic surface impedances of high-T/sub c/ superconducting thin films

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Cited by 32 publications
(23 citation statements)
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“…Measurements of the field and/or temperature induced changes of the quality factor Q and resonance frequency f 0 yielded changes in the effective surface impedance through the well known expression ∆Z ef f s (H, T ) = G∆ 1 Q(H,T ) − 2if 0 (H, T ) , where G is an appropriate geometrical factor 3 Noticeable exceptions are dielectrics with strong temperature dependent permittivity [110,114,115,116] or with an accidentally unfavorable combination of thickness, permittivity and operating frequency [117]. 4 We note that demagnetization effects determine a penetration field much smaller than Hc1 in thin films [119], and field inhomogeneities inside the sample are expected (and also directly found [120]) to be irrelevant in thin films for fields greater than a few mT in our temperature range.…”
Section: Cavity Measurementsmentioning
confidence: 99%
“…Measurements of the field and/or temperature induced changes of the quality factor Q and resonance frequency f 0 yielded changes in the effective surface impedance through the well known expression ∆Z ef f s (H, T ) = G∆ 1 Q(H,T ) − 2if 0 (H, T ) , where G is an appropriate geometrical factor 3 Noticeable exceptions are dielectrics with strong temperature dependent permittivity [110,114,115,116] or with an accidentally unfavorable combination of thickness, permittivity and operating frequency [117]. 4 We note that demagnetization effects determine a penetration field much smaller than Hc1 in thin films [119], and field inhomogeneities inside the sample are expected (and also directly found [120]) to be irrelevant in thin films for fields greater than a few mT in our temperature range.…”
Section: Cavity Measurementsmentioning
confidence: 99%
“…For a thin superconducting film with thickness d, the surface impedance in the Meissner state is referred to as the superconducting film intrinsic surface impedance given by 9,21 Z sM ,int ϭZ sM coth ͩ d ͪ .…”
Section: B Intrinsic Microwave Surface Impedance Of a Superconductinmentioning
confidence: 99%
“…For usual film thickness, 1 nmϽdϽ10 m, the effective microwave surface impedance in the Meissner state in Eq. ͑4͒ can be further simplified as 8,9 R s,eff ϭR sͫ coth ͩ d…”
Section: Introductionmentioning
confidence: 99%
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“…To date, a great deal of investigation in effective microwave surface impedance has been theoretically and experimentally done. In the Meissner state, the film response to a microwave field is theoretically interpreted based on the wellknown two-fluid theory and impedance transformation in transmission line theory [9]- [12]. For experimental data on the thickness-dependent we mention the papers of Oates et al [13] and other work [14]- [17].…”
Section: Nomenclaturementioning
confidence: 99%