Features of technology of high-temperature superconductor films for microwave filters

Vendik, I.; Vendik, O. G.; Zemlyakov, Kirill; Kolmakova, I. V.; Sitnikova, M. F.; Turalchuk, Pavel; Masterov, D. V.; Павлов, С. А.; Парафин, А. Е.

doi:10.1134/s1063785011050166

Cited by 9 publications

(7 citation statements)

References 2 publications

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“…Finally, the surface impedance is calculated as [28]: The ion beam was parallel to the c-axis of the crystals and the ion flux was kept below 1.8×10 8 cm −2 s −1 , in order to avoid sample damage due to heating. Here we consider fluences up to 3.6×10 12 cm −2 .…”

Section: Microwave Characterizationmentioning

confidence: 99%

Effects of heavy-ion irradiation on the microwave surface impedance of (Ba_1−xK_x)Fe₂As₂single crystals

Ghigo

Torsello

Gerbaldo

et al. 2018

Supercond. Sci. Technol.

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The electrodynamic response of Ba 1−x K x Fe 2 As 2 single crystals at the microwave frequencies has been investigated by means of a coplanar resonator technique, at different values of nonmagnetic disorder introduced into the samples by heavy-ion irradiation. The surface impedance Z s =R s +iX s conforms to the classical skin effect above the critical temperature. Below T c , R s monotonically decreases while X s shows a peak, which evolves as a function of the irradiation fluence. The disorder-dependent Z s (T) curves are analyzed within a two-fluid model, suitably modified to account for a finite quasiparticle fraction at T=0. The analysis gives, for the unirradiated crystal, quasiparticle relaxation times τ that are in good agreement with previous literature. Smaller τ values are deduced for the disordered crystals, both in the normal and in the superconducting states. The limits of application of the model are discussed.

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Section: Microwave Characterizationmentioning

confidence: 99%

Effects of heavy-ion irradiation on the microwave surface impedance of (Ba_1−xK_x)Fe₂As₂single crystals

Ghigo

Torsello

Gerbaldo

et al. 2018

Supercond. Sci. Technol.

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show abstract

“…The inductance per unit length is in turn the sum of a geometric inductance L g l and a kinetic inductance L k l . We fit the f 0 (T)/f 0 (T 0 ) experimental data with suitable parametric expressions for the temperature dependence of λ(T) and the permittivity of the substrate ε r (T), that enter into the formula through the kinetic inductance and the capacitance, respectively, and with standard formulas for coplanar waveguides [30]. T 0 is a reference temperature.…”

Section: Microwave Measurements and Analysis Techniquementioning

confidence: 99%

“…] −1/2 , which is a reasonable approximation for YBCO with exponent γ around 2 [30]. The fit is performed in a temperature range not too close to T c (where the microwave penetration depth deviates from the London penetration depth) and far from possible influences of two-level systems at the substrate surface [31] (i.e.…”

Section: Microwave Measurements and Analysis Techniquementioning

confidence: 99%

Tuning the response of YBCO microwave resonators by heavy-ion patterned micro-channels

Ghigo

Laviano

Gerbaldo

et al. 2012

Supercond. Sci. Technol.

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Channels with micron-size width have been carved in Y Ba2Cu3O7−x (YBCO) coplanar microwave resonators by micro-collimated swift heavy-ion irradiation at high fluences. The response of the resonators as a function of temperature, magnetic field and input power as well as magneto-optical imaging was used to characterize the properties of such micro-channels. The microwave method proposed to characterize the channels—with dimensions from 1/3200 to 1/178 of the wavelength—is based on the comparison between the fundamental and the first harmonic resonant modes. As expected due to the high irradiation fluence, higher penetration depth, higher microwave resistivity and lower nonlinearity thresholds have been found. In this configuration, it is shown that the micro-channels can be driven into a highly dissipative, nonlinear regime while the rest of the resonator still persists in a linear response. The higher responsivity of the micro-channels with respect to the as-grown YBCO was tested by applying an external magnetic field, showing that a locally applied external control signal can tune the response of the resonators, when properly biased. The possible impact of these results in the field of high temperature superconductor based sensors is discussed.

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“…Unfortunately, microstrip resonators possess relatively low Q that hinders the creation of narrow band filters with low loss in the passband. This problem can be solved by using high temperature superconductor films [1,5,6], but their application requires special cooling systems.…”

mentioning

confidence: 99%

Miniature coaxial resonator and related bandpass filter with ultra-wide stopband

et al. 2012

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Features of technology of high-temperature superconductor films for microwave filters

Cited by 9 publications

References 2 publications

Effects of heavy-ion irradiation on the microwave surface impedance of (Ba_1−xK_x)Fe₂As₂single crystals

Effects of heavy-ion irradiation on the microwave surface impedance of (Ba_1−xK_x)Fe₂As₂single crystals

Tuning the response of YBCO microwave resonators by heavy-ion patterned micro-channels

Miniature coaxial resonator and related bandpass filter with ultra-wide stopband

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Features of technology of high-temperature superconductor films for microwave filters

Cited by 9 publications

References 2 publications

Effects of heavy-ion irradiation on the microwave surface impedance of (Ba1−xKx)Fe2As2single crystals

Effects of heavy-ion irradiation on the microwave surface impedance of (Ba1−xKx)Fe2As2single crystals

Tuning the response of YBCO microwave resonators by heavy-ion patterned micro-channels

Miniature coaxial resonator and related bandpass filter with ultra-wide stopband

Contact Info

Product

Resources

About

Effects of heavy-ion irradiation on the microwave surface impedance of (Ba_1−xK_x)Fe₂As₂single crystals

Effects of heavy-ion irradiation on the microwave surface impedance of (Ba_1−xK_x)Fe₂As₂single crystals