Flux pinning properties in YBCO films with growth-controlled nano-dots and heavy-ion irradiation defects

Sueyoshi, Tetsuro; Kotaki, T.; Uraguchi, Y.; Suenaga, M.; Makihara, Takuma; Fujiyoshi, T.; Ishikawa, N.

doi:10.1016/j.physc.2016.04.011

Cited by 12 publications

(4 citation statements)

References 17 publications

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“…The I c enhancement is most prominent when the magnetic field is applied parallel to the damage tracks [4], [6]- [9]. On the other hand, a high density of irradiation tends to reduce current percolation and the superconducting transition temperature T c , with the result that I c can often be reduced for low magnetic fields or for magnetic fields applied in other directions [7], [8], [10].…”

Section: Strickland Ibmm2016mentioning

confidence: 99%

Effect of annealing high-dose heavy-ion irradiated high-temperature superconductor wires

Strickland

Wimbush

Kluth

et al. 2017

Nuclear Instruments and Methods in Physics Research Section B:

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Heavy-ion irradiation of high-temperature superconducting thin films has long been known to generate damage tracks of amorphized material that are of close-to-ideal dimension to effectively contribute to pinning of magnetic flux lines and thereby enhance the in-field critical current. At the same time, though, the presence of these tracks reduces the superconducting volume fraction available to transport current while the irradiation process itself generates oxygen depletion and disorder in the remaining superconducting material. We have irradiated commercially available superconducting coated conductors consisting of a thick film of (Y,Dy)Ba2Cu3O7 deposited on a buffered metal tape substrate in a continuous reel-to-reel process. Irradiation to emphasize the detrimental effects. The critical current was reduced following this irradiation, but annealing at relatively low temperatures of 200°C and 400°C substantially restore the critical current of the irradiated material. At high fields and high temperatures there is a net benefit of critical current compared to the untreated material.

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Section: Strickland Ibmm2016mentioning

confidence: 99%

Effect of annealing high-dose heavy-ion irradiated high-temperature superconductor wires

Strickland

Wimbush

Kluth

et al. 2017

Nuclear Instruments and Methods in Physics Research Section B:

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“…Наиболее распространенным способом повышения критического тока является создание искусственных центров пиннинга, препятствующих движению магнитного потока в сверхпроводнике, приводящего к появлению напряжения. Традиционными способами искусственного усиления пиннинга являются введение наноразмерных добавок (см., например, недавнюю работу по увеличению критического тока в ВТСП лентах второго поколения [1] и ссылки в ней), а также создание радиационных дефектов путем облучения ВТСП ионами высоких энергий, нейтронами и ударным плазменным воздействием [2][3][4][5][6][7][8][9]. При этом в сверхпроводящем материале формируются дефекты с характерным размером порядка длины когерентности, которые могут являться эффективными центрами пиннинга.…”

Section: Introductionunclassified

Механизм Формирования Критического Тока Высокотемпературных Сверхпроводников, Содержащих Сквозные Микроскопические Дефекты

Максимова¹,

Кашурников²,

Мороз³

et al. 2021

Физика Твердого Тела

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The critical current of a model high-temperature superconductor (HTSC) with defects in the form of through holes (antidots) with a characteristic size greater than or of the order of the penetration depth of the magnetic field is calculated. To do this, the subprocesses equivalent to the trapping of the magnetic flux by the hole and the creation of a vortex at the edge of the hole are introduced into the model of layered HTSC. It is shown that accounting for these subprocesses leads to the appearance of a physical mechanism that allows us to correctly describe the non-monotonic dependence of the critical current on the characteristic size of the antidot, similar to that observed in the experiment. Calculations were performed for a pure superconductor and a superconductor containing nanoscale pinning centers. It is shown that the presence of nanoscale pinning centers along with antipoints does not change the qualitative picture of the influence of the antidot radius on the pinning character of the magnetic flux and the behavior of the critical current in the HTSC.

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“…In order to introduce artificial pinning centers and enhance the flux pinning strength further, various approaches have been adopted previously including substitution of constitutional elements and creating defects through electron, x-ray, neutron or heavy ion irradiation [9][10][11][12]. Among these methods, chemical doping is considered to be the most effective way of enhancing Jc, because of the relative simplicity of fabrication, low-cost and flexibility.…”

Section: Introductionmentioning

confidence: 99%

Impurity effects on activation energy, structure and physical properties of Ybco superconductor

Ozabaci

2021

Commun.Fac.Sci.Univ.Ank.Series A2-A3: Phys.Sci. and Eng.

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The influence of separately added 0.3 wt%, CdO, Bi2O3, BeO and SiO2 on the phase formation, microstructure, magnetic and transport properties of Y1Ba2Cu3O(7-$\delta$) (Y-123 or YBCO) fabricated by conventional solid state reaction method has been analyzed. The results reveal a very low solubility limit for bismuth and silicon in the Y-123 phase, leading to precipitation phases located within intergranular regions. BeO addition suppresses the granular nature of the structure by probably incorporating into the host matrix. CdO does not have a remarkable effect both on structural and superconducting properties of the Y-123 at this doping ratio. Attractive infield transition behavior was obtained in the Bi2O3 added sample with a narrower transition width and an increase of transition temperatures approximately 1 K. The activation energy (U0), a potential energy barrier to prevent flux flow, of the samples was estimated by taking into account Arrhenius law. The best U0 value was computed to be 1.11 eV belonging to the Bi2O3 added sample which implies the contribution of 3-5 µm sized Bi containing precipitation regions on the flux pinning capability of the Y-123.

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Flux pinning properties in YBCO films with growth-controlled nano-dots and heavy-ion irradiation defects

Cited by 12 publications

References 17 publications

Effect of annealing high-dose heavy-ion irradiated high-temperature superconductor wires

Effect of annealing high-dose heavy-ion irradiated high-temperature superconductor wires

Механизм Формирования Критического Тока Высокотемпературных Сверхпроводников, Содержащих Сквозные Микроскопические Дефекты

Impurity effects on activation energy, structure and physical properties of Ybco superconductor

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