Large enhancement of the in-field critical current density of YBCO coated conductors due to composite pinning landscape

Kihlstrom, Karen J.; Civale, Leonardo; Eley, Serena Merteen; Miller, Dean J.; Welp, Ulrich; Kwok, Wai Kwong; Niraula, Prashantamani; Kayani, Asghar; Ghigo, Gianluca; Laviano, Francesco; Fleshler, Steven; Rupich, Martin W.; Leroux, Maxime

doi:10.1088/1361-6668/ab9f64

Title: Large enhancement of the in-field critical current density of YBCO coated conductors due to composite pinning landscape

Journal Article · Mon Nov 30 00:00:00 EST 2020 · Superconductor Science and Technology

DOI:https://doi.org/10.1088/1361-6668/ab9f64· OSTI ID:1779276

^[1];

^[2];

^[3]; Miller, Dean J. ^[4]; Welp, Ulrich ^[4]; Kwok, Wai Kwong ^[4]; Niraula, Prashantamani ^[5]; Kayani, Asghar ^[5];

^[6];

^[6]; Fleshler, Steven ^[7]; Rupich, Martin W. ^[7];

^[8]

Argonne National Lab. (ANL), Argonne, IL (United States); City Univ. of New York (CUNY), NY (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Colorado School of Mines, Golden, CO (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Western Michigan Univ., Kalamazoo MI (United States)
National Inst. of Nuclear Physics (INFN), Torino (Italy)
American Superconductor Corp., Ayer, MA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Centre National de la Recherche Scientifique (CNRS) (France)

YBa2Cu3O7-based coated conductors (CCs) achieve the highest critical current densities (J c) of any known superconductor and are a key technology for applications such as rotatory machines, high-field magnets and power transmission. Incorporation of nano-sized non-superconducting second phases as additional vortex pinning centers has been considered the most amenable route to further enhance J c at an industrial scale, and has been successfully used in commercial CCs. The resulting pinning landscape is quite complex, with both synergistic and competing interactions among the various types of defects. Particle irradiation, on the other hand, allows for a controlled post-processing incorporation of a well-defined defect morphology. We have previously shown that irradiation with protons and other light ions can further enhance the in-field J c in commercial state-of-the-art CCs. Here we develop a combined irradiation process that increases J c above values previously achieved by irradiating with only one species. Our new approach involves sequentially irradiating with 250 MeV Au ions and 4 MeV protons. For example, at T~ 27 K (liquid neon) and µ 0 H~ 4 T, a region of interest for rotatory machines applications, we obtain J c ~ 5 MA cm-2, which is about 40% higher than the values produced by the individual irradiations. Finally, we conclude that this is due to the synergistic pinning effects of the introduced splayed, non-uniform columnar defects and small clusters.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences and Engineering Division; National Science Foundation (NSF)

Grant/Contract Number:: AC02-06CH11357; 89233218CNA000001

OSTI ID:: 1779276

Alternate ID(s):: OSTI ID: 1841912

Report Number(s):: LA-UR-20-20099; 164872; TRN: US2209630

Journal Information:: Superconductor Science and Technology, Vol. 34, Issue 1; ISSN 0953-2048

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Large enhancement of the in-field critical current density of YBCO coated conductors due to composite pinning landscape

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