Isotropic Pinning Enhancement: Comparison between Spherical and Point Defects

Arya Ambadiyil Soman; Nicholas J. Long; Stuart C. Wimbush; Jerome Leveneur; John Kennedy; Christian Notthoff; Patrick Kluth; Martin W. Rupich; Nicholas M. Strickland

doi:10.1109/TASC.2023.3346860

Isotropic Pinning Enhancement: Comparison between Spherical and Point Defects

Arya Ambadiyil Soman, Nicholas J. Long^*, Stuart C. Wimbush, Jerome Leveneur, John Kennedy, Christian Notthoff, Patrick Kluth, Martin W. Rupich, Nicholas M. Strickland

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We have used silver-ion irradiation and proton irradiation to produce point-like and spherical defects in REBa2Cu3O7 coated conductors. We compare the resulting pinning landscape for optimized fluences and show that proton irradiation gives a slightly greater pinning enhancement at 20 K, but in the same samples silver irradiation gives significantly better pinning enhancement at 65 K. We attribute this to the relative sizes of the defects and to the distribution of defects resulting from the different ion collision rates.

Original language	English
Article number	8000405
Pages (from-to)	1-5
Number of pages	5
Journal	IEEE Transactions on Applied Superconductivity
Volume	34
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2023.3346860
Publication status	Published - 1 May 2024

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title = "Isotropic Pinning Enhancement: Comparison between Spherical and Point Defects",

abstract = "We have used silver-ion irradiation and proton irradiation to produce point-like and spherical defects in REBa2Cu3O7 coated conductors. We compare the resulting pinning landscape for optimized fluences and show that proton irradiation gives a slightly greater pinning enhancement at 20 K, but in the same samples silver irradiation gives significantly better pinning enhancement at 65 K. We attribute this to the relative sizes of the defects and to the distribution of defects resulting from the different ion collision rates.",

keywords = "Coated conductor, critical current, flux pinning, high-temperature superconductor, ion irradiation, proton irradiation",

author = "Soman, {Arya Ambadiyil} and Long, {Nicholas J.} and Wimbush, {Stuart C.} and Jerome Leveneur and John Kennedy and Christian Notthoff and Patrick Kluth and Rupich, {Martin W.} and Strickland, {Nicholas M.}",

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AU - Long, Nicholas J.

AU - Wimbush, Stuart C.

AU - Leveneur, Jerome

AU - Kennedy, John

AU - Notthoff, Christian

AU - Kluth, Patrick

AU - Rupich, Martin W.

AU - Strickland, Nicholas M.

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AB - We have used silver-ion irradiation and proton irradiation to produce point-like and spherical defects in REBa2Cu3O7 coated conductors. We compare the resulting pinning landscape for optimized fluences and show that proton irradiation gives a slightly greater pinning enhancement at 20 K, but in the same samples silver irradiation gives significantly better pinning enhancement at 65 K. We attribute this to the relative sizes of the defects and to the distribution of defects resulting from the different ion collision rates.

KW - Coated conductor

KW - critical current

KW - flux pinning

KW - high-temperature superconductor

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ER -

Isotropic Pinning Enhancement: Comparison between Spherical and Point Defects

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