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Exceptional structural and functional stability of Zr-doped REBaCuO tapes with respect to neutron irradiation and overheating
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SYSNO ASEP 0573334 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Exceptional structural and functional stability of Zr-doped REBaCuO tapes with respect to neutron irradiation and overheating Author(s) Jirsa, Miloš (UFP-V)
Rameš, M. (CZ)
Viererbl, L. (CZ)
Duchoň, J. (CZ)
Ďuran, Ivan (UFP-V) RID, ORCID
Entler, Slavomír (UFP-V) ORCIDNumber of authors 6 Article number 075005 Source Title Superconductor Science and Technology. - : Institute of Physics Publishing - ISSN 0953-2048
Roč. 36, č. 7 (2023)Number of pages 8 s. Publication form Online - E Language eng - English Country US - United States Keywords critical currents ; neutron irradiation ; radiation overheating ; second generation REBaCuO tapes ; superconducting materials Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects LM2018096 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UFP-V - RVO:61389021 UT WOS 000995213900001 EID SCOPUS 85160518880 DOI 10.1088/1361-6668/acd229 Annotation The impact of neutron irradiation on the properties of second-generation REBaCuO tapes was studied. The main aim of the present study was to identify the fast neutrons irradiation fluence threshold, φ th, at which the high-field critical current at low temperatures, I c (10 K, 8 T), starts degrading. Following up on our previous publication for low irradiation fluences, two new irradiation steps were added. Up to the last but one irradiation step, the T c in all samples followed a linear dependence on the fast neutrons irradiation fluence, T c(φ) ≈ T c(0) − τφ (τ being a numerical constant in units of K/1022 m−2 and φ in 1022 m−2). In parallel, I c (10 K, 8 T) continuously grew with φ up to the threshold fluence, φ th ≈ 3× to 4.3 × 1022 m−2. The last gradual irradiation by φ≈ 1.83 × 1022 m−2 brought a severe degradation both in T c and I c (10 K, 8 T) in most samples, irrespective of their irradiation history. This effect was attributed to radiation overheating. Annealing of pristine tapes in dilute Ar confirmed this scenario. Two of the SuperPower tapes, doped by Zr, appeared to be exceptionally stable against both types of overheating. The tape doped with 7.5% Zr, T c(φ) followed the linear dependence up to the highest cumulative fluence φ =6.16 × 1022 m−2, while the I c (10 K, 8 T) drop was several orders of magnitude lower than in the samples without Zr. TEM study found that the Zr-doped tapes survived the overheating during the last irradiation step in a crystalline form, while all other samples were amorphized. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2024 Electronic address https://iopscience.iop.org/article/10.1088/1361-6668/acd229
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