Cryogen-free 1kA-class<i>I<sub>c</sub></i>measurement system featuring an 8 T HTS magnet

Strickland, N. M.; Hoffmann, Christian; Wimbush, Stuart C.; Pooke, D.; Huang, Tianming; Lazic, Z; Chamritski, V.; Talantsev, E. F.; Long, N.J.; Tallon, J. L.

doi:10.1088/1742-6596/507/2/022037

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…4 and Supplementary Information. However, Ic(sf,T) measurement techniques (and particularly inside of ultrahigh-pressure diamond cells) need to be further developed, because these measurements require great precaution due to the danger of sample "burning" during transport current pulse [76][77][78], and Ic(sf,T) data collecting is still state-of-art [79,80]. For instance, LaH10 samples degradation, after Ic(sf,T) measurements reported by Somayazulu et al [20], is more likely originated from the sample "burning" under transport current flow.…”

Section: Self-field Critical Currents In Compressed Lah10mentioning

confidence: 99%

Classifying hydrogen-rich superconductors

Talantsev

2019

Mater. Res. Express

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The era of near-room-temperature superconductivity started after experimental discovery by Drozdov et al (2015 Nature 525 73) who found that compressed H3S exhibits superconducting transition at Tc = 203 K. To date, the record near-room-temperature superconductivity stands with another hydrogen-rich highly compressed compound, LaH10 (Somayazulu et al 2019 Phys. Rev. Lett. 122 027001), which has critical temperature of > 240 . In this paper, we analyse available upper critical field, Bc2(T), data for LaH10 (Drozdov et al 2019 Nature 569 528) and report that this compound in all consideredscenarios has the ratio of Tc to the Fermi temperature, TF, 0.009 < Tc/TF < 0.038, which is typical range for unconventional superconductors. In attempt to extend our finding, we examined experimental Bc2(T) data for superconductors in the palladium-hydrogen (PdHx) and thorium-hydrogen-deiterium (ThH-ThD) systems and surprisingly find that superconductors in both these systems also fall into unconventional superconductors band.Taking in account that H3S has the ratio of 0.012 < Tc/TF < 0.039 (Talantsev 2019 Mod. Phys. Lett. B 33 1950195) we come to conclusion that in the Uemura plot all discovered to date hydrogen-rich superconductors, i.e. Th4H15-Th4D15, PdHx, H3S and LaH10 (in this list we do not include NbTiHx, PtHx, SiH4, and PH3 for which experimental data beyond Tc are unknown), lie in same band as all unconventional superconductors, particularly heavy

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Section: Self-field Critical Currents In Compressed Lah10mentioning

confidence: 99%

Classifying hydrogen-rich superconductors

Talantsev

2019

Mater. Res. Express

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“…Measurements were performed in a bespoke cryogen-free I c measurement system as described elsewhere [11], [12], with capability to cool the sample to 22 K, applied magnetic field of up to 8 T, full azimuthal field-angular range and up to 800 A transport current.…”

Section: B Critical Current Measurementsmentioning

confidence: 99%

Effective Low-Temperature Flux Pinning by Au Ion Irradiation in HTS Coated Conductors

Strickland

Wimbush

Kennedy

et al. 2015

IEEE Trans. Appl. Supercond.

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We report the effects of heavy-ion irradiation on critical currents in (Y,Dy)Ba 2 Cu 3 O 7−δ coated conductors made by a commercial metal organic deposition process. Irradiation with 185 MeV Au ions is investigated and contrasted with previous results on 74 MeV Ag ions. The change in critical current (I c ) is reported as a function of temperature (30-77 K), magnetic field (0-7 T) and magnetic-field angle (full angle dependence). Significant improvements are seen particularly at 30-40 K where I c can be enhanced over a wide angular range and the minimum of I c (θ) has been enhanced by up to 60%. This contrasts with the data for the commonly utilized regime of 77 K, 1 T where the I c enhancements are small or limited to a narrow angular range. This data also serves to illustrate the need to measure I c in all of the temperature and field regimes of technical interest and to measure the complete field-angular dependence I c (θ).

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“…Yazdani-Asrami, and W. Song, are with Propulsion, Electrification & Superconductivity group, Autonomous Systems & Connectivity division, James Watt School of Engineering, University of Glasgow, Glasgow, G12 Figure 1. Twisting of HTS tapes in form of CORC cables in HTS magnets, figures adapted from [2]- [5]. also HTS tapes and cables are used in the form of coils to generate the required magnetic field with required properties [17], [18].…”

Section: Introductionmentioning

confidence: 99%

“…As shown in Figure 1, usually in magnet applications, HTS tapes and cables are twisted to build up the coils and the magnet systems [2]- [5]. Twisting of HTS tapes causes local critical current density (Jc) reduction and stress increase.…”

Section: Introductionmentioning

confidence: 99%