Variation ofTc, lattice parameter and atomic ordering in Nb3Sn platelets irradiated with 12 MeV protons: correlation with the number of induced Frenkel defects

Flükiger, R.; Spina, Tiziana; Cerutti, F.; Ballarino, A.; Scheuerlein, C.; Bottura, L.; Zubavichus, Ya. V.; Ryazanov, A. I.; Svetogovov, R D; Shavkin, S. V.; Degtyarenko, P. N.; Semenov, Yu. V.; Senatore, Carmine; Černý, Radovan

doi:10.1088/1361-6668/aa64ee

Cited by 14 publications

(11 citation statements)

References 33 publications

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“…Figure 4b shows a plot of T c as a function of dpa for Ta–Nb–Hf–Zr–Ti HEA SC thin films and other superconductors with potential for practical application, such as Nb 3 Sn 38 , MgB 2 39 , YBa 2 Cu 3 O 7− x 40 , and K-doped BaFe 2 As 2 41 . Here, T c was normalized to the T c of each pristine sample ( T c,0 ) for comparison.…”

Section: Resultsmentioning

confidence: 99%

“…However, the range of the dpa values for the HEA SC thin films differed significantly from those for the other superconductors: the superconductivity of the HEA SC thin films was over 1000 times more resistant to displacement damage than that of the other superconductors. The suppression of T c in crystalline SC materials against dpa is generally considered to be a result of the disorder effect associated with SC gap pairing symmetry and the degradation of crystallinity due to atomic disorder 38 , 42 . In contrast, the extraordinarily stable SC phase of HEAs against irradiation-induced disorder could be related to the occurrence of amorphization-recrystallization and the high interstitial–vacancy recombination rate associated with the high atomic-level stress and/or high-level lattice distortion in HEAs resulting from their high configuration entropy 3 , 43 – 45 .…”

Section: Resultsmentioning

confidence: 99%

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High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

et al. 2022

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High-entropy alloy (HEA) superconductors—a new class of functional materials—can be utilized stably under extreme conditions, such as in space environments, owing to their high mechanical hardness and excellent irradiation tolerance. However, the feasibility of practical applications of HEA superconductors has not yet been demonstrated because the critical current density (Jc) for HEA superconductors has not yet been adequately characterized. Here, we report the fabrication of high-quality superconducting (SC) thin films of Ta–Nb–Hf–Zr–Ti HEAs via a pulsed laser deposition. The thin films exhibit a large Jc of >1 MA cm−2 at 4.2 K and are therefore favorable for SC devices as well as large-scale applications. In addition, they show extremely robust superconductivity to irradiation-induced disorder controlled by the dose of Kr-ion irradiation. The superconductivity of the HEA films is more than 1000 times more resistant to displacement damage than that of other promising superconductors with technological applications, such as MgB2, Nb3Sn, Fe-based superconductors, and high-Tc cuprate superconductors. These results demonstrate that HEA superconductors have considerable potential for use under extreme conditions, such as in aerospace applications, nuclear fusion reactors, and high-field SC magnets.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

et al. 2022

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“…Further details on the synthesis procedure and preliminary characterization can be found in Ref. [32]. Samples from the same batch were characterized by means of microwave measurements [33], yielding a normal state resistivity ρ n 14.8 µΩ • cm, a critical temperature T c = 17.8 K and an extrapolated upper critical field H c2 , giving µH c2 (0) of 27 T [34], in full agreement with the accepted values [4] for pure Nb 3 Sn.…”

Section: Methodsmentioning

confidence: 99%

Anomalous Behavior in the Atomic Structure of Nb3Sn under High Pressure

et al. 2021

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In the present study, the local atomic structure of a Nb3Sn superconductor sample has been probed by X-ray absorption fine structure (XAFS) as a function of hydrostatic pressure (from ambient up to 26 GPa) using a diamond anvil cell set-up. The analysis of the Nb-K edge extended X-ray absorption fine structure (EXAFS) data was carried out combining standard multi shell structural refinement and reverse Monte Carlo method to provide detailed in situ characterization of the pressure-induced evolution of the Nb local structure in Nb3Sn. The results highlight a complex evolution of Nb chains at the local atomic scale, with a peculiar correlated displacement of Nb–Nb and Nb–Nb–Nb configurations. Such a local effect appears related to anomalies evidenced by X-ray diffraction in other superconductors belonging to the same A15 crystallographic structure.

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“…However, the range of the dpa values for the HEA SC thin lms differed signi cantly from those for the other superconductors: the superconductivity of the HEA SC thin lms was over 1000 times more resistant to displacement damage than that of the other superconductors. The suppression of T c in crystalline SC materials against dpa is generally considered to be a result of the disorder effect associated with SC gap pairing symmetry and the degradation of crystallinity due to atomic disorder 29,33 . In contrast, the extraordinarily stable SC phase of HEAs against irradiation-induced disorder could be related to their intrinsically high con guration entropy resulting from the random distribution of their constituent atoms 3,13,[34][35][36] .…”

Section: Effect Of Ion Irradiation On Hea Sc Thin Lmsmentioning

confidence: 99%

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

Jung

Han

Kim

et al. 2022

Preprint

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High-entropy alloy (HEA) superconductors—a new class of functional materials—can be utilized stably under extreme conditions, such as in space environments, owing to their high mechanical hardness and excellent irradiation tolerance1–7. However, the feasibility of practical applications of HEA superconductors has not yet been demonstrated because the critical current density (Jc) for HEA superconductors has not yet been adequately characterized. Here, we report the fabrication of high-quality SC thin films of Ta–Nb–Hf–Zr–Ti HEAs via a pulsed laser deposition. The thin films exhibit a large Jc of > 1 MA cm−2 at 4.2 K and are therefore favorable for SC devices as well as large-scale applications. In addition, they show extremely robust superconductivity to irradiation-induced disorder controlled by the dose of Kr-ion irradiation. The superconductivity of the HEA films is more than 1000 times more resistant to displacement damage than that of other promising superconductors with technological applications, such as MgB2, Nb3Sn, Fe-based superconductors, and high-Tc cuprate superconductors. These results demonstrate that HEA superconductors have considerable potential for use under extreme conditions, such as in aerospace applications, nuclear fusion reactors, and high-field SC magnets.

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Variation ofT_c, lattice parameter and atomic ordering in Nb₃Sn platelets irradiated with 12 MeV protons: correlation with the number of induced Frenkel defects

Cited by 14 publications

References 33 publications

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

Anomalous Behavior in the Atomic Structure of Nb3Sn under High Pressure

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

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