In-field critical current and pinning mechanisms at 4.2 K of Zr-added REBCO coated conductors

Galstyan, Eduard; Pratap, Rudra; Majkic, Goran; Kochat, Mehdi; Abraimov, Dmytro; Jaroszynski, Jan; Selvamanickam, Venkat

doi:10.1088/1361-6668/ab90c6

Title: In-field critical current and pinning mechanisms at 4.2 K of Zr-added REBCO coated conductors

Journal Article · Wed Jun 03 00:00:00 EDT 2020 · Superconductor Science and Technology

DOI:https://doi.org/10.1088/1361-6668/ab90c6· OSTI ID:1802864

^[1]; Pratap, Rudra ^[1];

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^[1]; Abraimov, Dmytro ^[2];

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Univ. of Houston, TX (United States). Dept. of Mechanical Engineering. Advanced Manufacturing Inst. Texas Center for Superconductivity
Florida State Univ., Tallahassee, FL (United States). Applied Superconductivity Center. National High Magnetic Field Lab.

The critical current and pinning mechanisms at 4.2 K have been studied over a magnetic field range of 0–14 T for Zr-added (0, 5 and 15 mol.%) REBa₂Cu₃O_7-x (REBCO and RE = rare earth) coated conductors fabricated by advanced metal organic chemical vapor deposition (A-MOCVD). It is found that the (Ba + Zr)/Cu content in Zr-added (5 and 15 mol.%) REBCO affects the critical current at 77 K, 0 T as well as density, continuity and shape of BaZrO₃ (BZO) self-assembled nanocolumns and RE₂O₃ in-plane precipitates that significantly enhance the pinning force density Fp(H) as well as isotropic pinning landscape at 4.2 K. In addition to bell-shape dependence of critical current density, J_c, at 4.2 K with (Ba + Zr)/Cu content we observed an unusual Fp(H) behavior correlated to particular type of pinning centers, morphology and distribution that have been revealed by TEM microstructure analysis. By fitting the Dew–Hughes equation of the pinning force density Fp(H) at 4.2 K we extract the scaling behaviors of the Fp(H) associated with the competition of pinning mechanisms driven by vertically-aligned BZO nanorods and in-plane RE₂O₃ pinning defects. This result sheds light on approaches towards interactive control of strong and isotropic pinning centers in Zr-added REBa₂Cu₃O_7-x (REBCO and RE = rare earth) coated conductors, and especially understanding the correlation between microstructural characteristics and vortex pinning mechanisms at 4.2 K in high magnetic fields.

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Research Organization:: Univ. of Houston, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

Grant/Contract Number:: SC0016220; DMR-1644779

OSTI ID:: 1802864

Alternate ID(s):: OSTI ID: 1632779

Journal Information:: Superconductor Science and Technology, Vol. 33, Issue 7; ISSN 0953-2048

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
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Title: In-field critical current and pinning mechanisms at 4.2 K of Zr-added REBCO coated conductors

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