Irradiation performance of rare earth and nanoparticle enhanced high temperature superconducting films based on YBCO

Leonard, Keith J.; List, F.A.; Aytuğ, Tolga; Gapud, A.A.; Geringer, Josina W.

doi:10.1016/j.nme.2016.03.004

Cited by 11 publications

(6 citation statements)

References 30 publications

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“…Except in very low magnetic fields, an initial increase in J c at low dose is followed by rapid decrease after a critical dose which depends on the type of conductor, measurement temperature and type of projectile. The initial improvement in J c has been associated with the introduction of additional non‐superconducting flux pinning centres, 12,13 and the subsequent rapid degradation due to both the increased rate of flux creep rate (caused by the reduced separation of flux pinning centres decreasing the activation barrier) 14 and the eventual loss of superconducting cross‐sectional area, 15 although no reliable method has been suggested to demonstrate or quantify this second effect. The effect of neutron irradiation on superconducting critical temperature ( T c ) has also been studied and showed a linear reduction in T c with a slope of approximately 3% per 1 × 10 22 n/m 2 fluence is reported, 16,17 but the width of the superconductor/normal transition temperature is unchanged 18 .…”

Section: Introductionmentioning

confidence: 99%

Analysing neutron radiation damage in YBa₂Cu₃O_7–_x high‐temperature superconductor tapes

Linden

Iliffe

et al. 2022

Journal of Microscopy

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Superconducting windings will be necessary in future fusion reactors to generate the strong magnetic fields needed to confine the plasma, and these superconducting materials will inevitably be exposed to neutron damage. It is known that this exposure results in the creation of isolated damage cascades, but the presence of these defects alone is not sufficient to explain the degradation of macroscopic superconducting properties and a quantitative method is needed to assess the subtle lattice damage in between the clusters. We have studied REBCO‐coated conductors irradiated with neutrons to a cumulative dose of 3.3 × 1022 n/m2 that show a degradation of both Tc and Jc values, and use HRTEM analysis to show that this irradiation introduces ∼10 nm amorphous collision cascades. In addition, we introduce a new method for the analysis of these images to quantify the degree of lattice disorder in the apparently perfect matrix between these cascades. This method utilises Fast Fourier and Discrete Cosine Transformations of a statistically relevant number of HRTEM images of pristine, neutron‐irradiated and amorphous samples and extracts the degree of randomness in terms of entropy values. Our results show that these entropy values in both mid‐frequency band FFT and DCT domains correlate with the expected level of lattice damage, with the pristine samples having the lowest and the fully amorphous regions the highest entropy values. Our methodology allows us to quantify ‘invisible’ lattice damage to and correlate these values to the degradation of superconducting properties, and also has relevance for a wider range of applications in the field of electron microscopy where small changes in lattice perfection need to be measured.

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Section: Introductionmentioning

confidence: 99%

Analysing neutron radiation damage in YBa₂Cu₃O_7–_x high‐temperature superconductor tapes

Linden

Iliffe

et al. 2022

Journal of Microscopy

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“…Great efforts have been made to introduce artificial defects as pinning centers into RE123 thin films to improve the I c of RE123 CCs. [3][4][5][6] Among these defects, Y124-type SFs are frequently observed, due to additional randomly distributed Cu-O stacking faults inserted into the Y123 matrix to form a Y124-type structure. It is believed that the evolution of Y124-type SFs can be attributed to an inadequate reaction or insufficient ion diffusion during the growth of RE123 films, especially when the ex situ metal-organic deposition (MOD) method is used.…”

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confidence: 99%

Significant improvement of the critical current of MOD-derived YBa₂Cu₃O_7-δ-coated conductors by post-annealing treatment

Chen

Huang

Shen

et al. 2021

Appl. Phys. Express

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This paper reports that in REBa2Cu3O7−δ (RE123 or REBCO, RE = Y or rare earth)-coated conductors (CCs) prepared by ex situ metal–organic deposition (MOD), it is feasible to obtain YBa2Cu4O8-type stacking faults (Y124-type SFs) by a post-annealing treatment, and hence to improve its microstructures as well as the critical current (I c) at 77 K. Detailed studies show that the formation and evolution of Y124-type SFs plays an important role in I c improvement for MOD-derived YBCO CCs, with an increase of I c(77 K) as large as 50 ∼ 120 A for samples 12 mm in width. This cost-effective approach implies great commercial value for scaled processing.

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“…Альтернативным методом создания искусственных центров пиннинга являются радиационные воздействия. На практике используется облучение нейтронами [31][32][33][34][35][36][37][38], протонами [39], электронами [40], γ-квантами [41] и тяжелыми ионами [42]. Помимо возможности создания дополнительных центров пиннинга при малых концентрациях дефектов, радиационное воздействие привлекательно тем, что, используя ионное облучение с энергиями порядка 1−10 МeV, можно создать концентрации дефектов, существенно изменяющие критический ток и критическую температуру вплоть до полной потери сверхпроводимости.…”

Section: Introductionunclassified

Увеличение Критического Тока Сверхпроводящих Композитов При Имплантации Ионов Железа

Руднев¹,

Подливаев²,

Абин³

et al. 2023

Физика Твердого Тела

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The results of studying the effect of ion irradiation (Fe2+ ions E=5.6 MeV) in the modes of creating radiation defects and implantation on the critical current of high-temperature superconducting (HTS) composites are presented. An analysis was made of both the integral critical current obtained from measurements of the total magnetization of the samples and the local critical current determined from the data of scanning Hall magnetometry. It is shown that at the same ion fluence Ф=2‧1013 cm-2, an increase in the critical current Jc is observed in the ion implantation regime, while in the regime of radiation defects, a slight drop in Jc is observed. This circumstance indicates an enhancement of pinning due to the additional magnetic interaction of Abrikosov vortices with magnetic ions implanted in the HTS layer.

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Irradiation performance of rare earth and nanoparticle enhanced high temperature superconducting films based on YBCO

Cited by 11 publications

References 30 publications

Analysing neutron radiation damage in YBa₂Cu₃O_7–_x high‐temperature superconductor tapes

Analysing neutron radiation damage in YBa₂Cu₃O_7–_x high‐temperature superconductor tapes

Significant improvement of the critical current of MOD-derived YBa₂Cu₃O_7-δ-coated conductors by post-annealing treatment

Увеличение Критического Тока Сверхпроводящих Композитов При Имплантации Ионов Железа

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Irradiation performance of rare earth and nanoparticle enhanced high temperature superconducting films based on YBCO

Cited by 11 publications

References 30 publications

Analysing neutron radiation damage in YBa2Cu3O7–x high‐temperature superconductor tapes

Analysing neutron radiation damage in YBa2Cu3O7–x high‐temperature superconductor tapes

Significant improvement of the critical current of MOD-derived YBa2Cu3O7-δ -coated conductors by post-annealing treatment

Увеличение Критического Тока Сверхпроводящих Композитов При Имплантации Ионов Железа

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Analysing neutron radiation damage in YBa₂Cu₃O_7–_x high‐temperature superconductor tapes

Analysing neutron radiation damage in YBa₂Cu₃O_7–_x high‐temperature superconductor tapes

Significant improvement of the critical current of MOD-derived YBa₂Cu₃O_7-δ-coated conductors by post-annealing treatment