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Advances in Superconducting Materials: Characterization, Properties and Applications (Second Edition)

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Special Issue Editor

Special Issue Information

Dear Colleagues,

The discovery of superconductivity in cuprates and iron-based superconductors has led to significant improvements driven by the quest for higher and higher superconducting transition temperatures. In the early stages of development, there was tremendous excitement in both physical science and engineering. However, the complexity of the new material on the one hand and the absence of a viable theory on the other made further development even more difficult. Therefore, the excitement of the initial period has given way to a more systematic and detailed form of studying when it comes to all aspects of superconductivity. This Special Issue is intended to provide an opportunity to review the current progress in selected superconducting fields. Emphasis is placed on experimental and theoretical studies of new superconductors, advances in theoretical understanding, advances in flux pinning and vortex dynamics studies affecting critical currents, and the development of new methods for material synthesis.

Prof. Dr. Yong Seung Kwon
Guest Editor

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Keywords

experimental and theoretical studies of new superconductors
advances in experimental results (electrical, thermal, magnetic, optical)
advances in theoretical understanding
development of new methods for superconducting-relative material synthesis
advances in flux pinning and vortex dynamics studies
coexistence or competition of superconductivity with other orders

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Research

11 pages, 3406 KiB

Open AccessArticle

Effect of Proton Irradiation on Thin-Film YBa₂Cu₃O_7−δ Superconductor

by Joseph Fogt, Hope Weeda, Trevor Harrison, Nolan Miles and Kyuil Cho

Materials 2024, 17(18), 4601; https://doi.org/10.3390/ma17184601 - 19 Sep 2024

Viewed by 801

Abstract

We investigated the effect of 0.6 MeV proton irradiation on the superconducting and normal-state properties of thin-film

{YBa}_{2} {Cu}_{3} O_{7 - δ}

superconductors. A thin-film YBCO superconductor (≈567 nm thick) was subject to a series of proton irradiations with a [...] Read more.

We investigated the effect of 0.6 MeV proton irradiation on the superconducting and normal-state properties of thin-film

{YBa}_{2} {Cu}_{3} O_{7 - δ}

superconductors. A thin-film YBCO superconductor (≈567 nm thick) was subject to a series of proton irradiations with a total fluence of

7.6 \times 10^{16}

{p / cm}^{2}

. Upon irradiation,

T_{c}

was drastically decreased from 89.3 K towards zero with a corresponding increase in the normal-state resistivity above

T_{c}

. This increase in resistivity, which indicates an increase in defects inside the thin-film sample, can be converted to the dimensionless scattering rate. We found that the relation between

T_{c}

and the dimensionless scattering rate obtained during proton irradiation approximates the generalized d-wave Abrikosov–Gor’kov theory better than the previous results obtained from electron irradiations. This is an unexpected result, since the electron irradiation is known to be most effective to suppress superconductivity over other heavier ion irradiations such as proton irradiation. In comparison with the previous irradiation studies, we found that the result can be explained by two facts. First, the dominant defects created by 0.6 MeV protons can be point-like when the implantation depth is much longer than the sample thickness. Second, the presence of defects on all element sites is important to effectively suppress

T_{c}

. Full article

(This article belongs to the Special Issue Advances in Superconducting Materials: Characterization, Properties and Applications (Second Edition))

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