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Balevičius, Saulius; Jukna, A.; Šatkovskis, E.; Kiprijanovič, O.; Pyragas, Viktoras; Vengalis, B.; Lisauskas, V.; Anisimovas, F.; Butkutė, Renata; Abrutis, A.; Altgilbers, L.L.

doi:10.1023/a:1022595128422

Cited by 3 publications

(7 citation statements)

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“…1, when average current density is above 10 6 A/cm 2 , the density at λ eff exceeds value ≈ 2 × 10 7 A/cm 2 , and it corresponds to the condition I c ≈ I d for perfect films [5]. Quasi-homogeneous current distribution contributes to formation of edge barriers with bending current lines and offer resistance to entry of vortexes [6].…”

Section: Discussion Of Resultsmentioning

confidence: 98%

“…This is a possible explanation why the difference j d − j c goes to zero for perfect thin films [5] and they therefore are not suitable for repeated S-N switching.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

“…During experiment [2] YBaCuO tapes fabricated by laser ablation technique on MgO and NdGaO 3 substrates were used. Critical temperature T c of the tapes was in 85-93 K range.…”

Section: High-t C Superconducting Ybacuo Tapesmentioning

confidence: 99%

“…For the "high" quality tapes λ L (0) is less than 160 nm and γ exceeds 1.8. For a tape of width w and thickness d effective penetration depth λ eff is [4]: 2) and current density at λ eff is defined by…”

Section: Current Density At Effective Penetration Depth Of the Tapementioning

confidence: 99%

“…Another important field of tasks is increase of reliability and lifetime of superconducting devices working in regimes of repeated fast S-N switching (transition from superconducting S state to normal N state), for example in opto-electronic generators of high voltage electrical pulses where thin films are used [2].…”

Section: Introductionmentioning

confidence: 99%

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Applicable Damage of High-T_cYbaCuO Superconducting Tapes by Current and Laser Pulses

et al. 2011

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Damage and irreversible damage of YBaCuO tapes with high density current after switching from superconducting to normal state are investigated. Quasi-homogeneous current distribution across the tape in superconducting state can cause perfect tape damage or irreversible damage when current is slightly above critical value. The model of the tape heating during the optically initiated switching from superconducting to normal state is proposed. Analysis of causes inducing damage shows necessity to consider 0.5T m damage criterion because of strong current influence on the damage processes. Possible damage mechanisms are described and crack tips motion simultaneously with switching from superconducting to normal state is considered. Application of optically illuminated YBaCuO tapes with nanosecond duration current pulses on the base of the described mechanisms is proposed.

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Section: Discussion Of Resultsmentioning

confidence: 98%

“…This is a possible explanation why the difference j d − j c goes to zero for perfect thin films [5] and they therefore are not suitable for repeated S-N switching.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

“…During experiment [2] YBaCuO tapes fabricated by laser ablation technique on MgO and NdGaO 3 substrates were used. Critical temperature T c of the tapes was in 85-93 K range.…”

Section: High-t C Superconducting Ybacuo Tapesmentioning

confidence: 99%

Section: Current Density At Effective Penetration Depth Of the Tapementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Applicable Damage of High-T_cYbaCuO Superconducting Tapes by Current and Laser Pulses

et al. 2011

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Superconducting protector against electromagnetic pulses based on YBCO film prepared on an Al₂O₃ substrate with a CeO₂ sublayer

Vertelis¹,

Stankevič²,

Balevičius³

et al. 2021

Supercond. Sci. Technol.

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The electric and magnetic properties of microbridges made from 440 nm thick Y–Ba–Cu–O films prepared on Al2O3 substrates with CeO2 sublayers by the pulsed injection metal organic chemical vapor deposition (MOCVD) method were studied in temperatures ranging from 20 K to 300 K in order to investigate the possibilities of using these microbridges as fast fault current limiters. The application of an external magnetic field ( B ex ) causes the flux flow induced magneto-resistive effect, which is proportional to B ex and to B ex 1 / 2 at low and high temperatures, respectively. The experimentally obtained S-shaped I–V characteristic and the change of the microbridge resistance over time when affected by a step-like magnetic field can be well explained using a thermo-electrical model based on Joule heating and the flux flow nature of the resistive state (RS). The transition from the superconducting to the RS, studied using ns duration rectangular waveform electrical pulses able to create up to ≈2106 A cm−2 current densities without rises of microbridge temperatures, demonstrated that the I–V characteristics of the RSs consisting of an assembly of straight lines corresponding to the different pinning centers. At temperatures close to the critical temperature of superconductivity, the number of these lines increases, and the I–V characteristics can be described with high accuracy by a power law. It was concluded that microbridges made from these films can be used as protectors against complicated waveform electromagnetic pulses having short rise times, high voltage peak amplitudes and long low-value over-current ‘tails’.

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EMP Effects on High-<tex>$T _c$</tex>Superconducting Devices

Balevičius¹,

Pyragas²,

Žurauskienė³

et al. 2004

IEEE Trans. Appl. Supercond.

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The results of a study of irreversible damage induced in microstrips made from high-thin films by high-power electromagnetic pulses is presented. It was demonstrated that at high supercritical currents, the magnetic flux flow process induces fast thermomagnetic instability. The result of this instability is local magnetic flux propagation, and subsequent irreversible damage of the high-film. The parameter = ( ) , where and are the critical damaging and superconducting-to-dissipative state transition currents, respectively, which represents the capability of the high-microstrip to withstand supercritical current, depends on the quality and critical current density of the film.

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Cited by 3 publications

References 1 publication

Applicable Damage of High-T_cYbaCuO Superconducting Tapes by Current and Laser Pulses

Applicable Damage of High-T_cYbaCuO Superconducting Tapes by Current and Laser Pulses

Superconducting protector against electromagnetic pulses based on YBCO film prepared on an Al₂O₃ substrate with a CeO₂ sublayer

EMP Effects on High-<tex>$T _c$</tex>Superconducting Devices

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Untitled

Cited by 3 publications

References 1 publication

Applicable Damage of High-TcYbaCuO Superconducting Tapes by Current and Laser Pulses

Applicable Damage of High-TcYbaCuO Superconducting Tapes by Current and Laser Pulses

Superconducting protector against electromagnetic pulses based on YBCO film prepared on an Al2O3 substrate with a CeO2 sublayer

EMP Effects on High-&lt;tex&gt;$T _c$&lt;/tex&gt;Superconducting Devices

Contact Info

Product

Resources

About

Applicable Damage of High-T_cYbaCuO Superconducting Tapes by Current and Laser Pulses

Applicable Damage of High-T_cYbaCuO Superconducting Tapes by Current and Laser Pulses

Superconducting protector against electromagnetic pulses based on YBCO film prepared on an Al₂O₃ substrate with a CeO₂ sublayer

EMP Effects on High-<tex>$T _c$</tex>Superconducting Devices