Two-Fold Reduction of Jc Anisotropy in FeSe0.5Te0.5 Films Using Low-Energy Proton Irradiation

Ozaki, Toshinori; Li, Qiang; Jaroszynski, Jan

doi:10.1109/tasc.2019.2900615

Title: Two-Fold Reduction of J_c Anisotropy in FeSe_0.5Te_0.5 Films Using Low-Energy Proton Irradiation

Abstract

High in-field performance and low anisotropy of critical current density J_c are important for superconducting wires/tapes in rotating machine and magnet applications. Here, we report measurements of angular dependence of critical current density J_c in pro-ton irradiated FeSe_0.5Te_0.5 (FST) films at magnetic field up to 35 T. Here, we observed two-fold reduction in the J_c anisotropy of FST films at 4.2 K and 15 Tesla magnetic field by irradiation with low-energy (190 keV) proton. In light of recent demonstration of roll-to-roll irradiation process successfully incorporated in the standard 2G HTS long length production wire, low-energy proton irradiation can be a practical solution to enhance the performance of iron-based super-conducting wires and tapes, as low-energy ion sources are inexpensive to operate and are readily available commercially.

Authors:

Ozaki, Toshinori ^[1];

^[2]; Jaroszynski, Jan ^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States); Kwansei Gakuin Univ., Hyogo (Japan)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Florida State Univ., Tallahassee, FL (United States)

Publication Date:: Thu Aug 01 00:00:00 EDT 2019

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1506635

Report Number(s):: BNL-211520-2019-JAAM
Journal ID: ISSN 1051-8223

Grant/Contract Number:: SC0012704

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Applied Superconductivity

Additional Journal Information:: Journal Volume: 29; Journal Issue: 51; Journal ID: ISSN 1051-8223

Publisher:: Institute of Electrical and Electronics Engineers (IEEE)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; critical current density; flux pinning; iron-based superconductors; iron chalcogenide thin films; irradiation

Citation Formats


                    Ozaki, Toshinori, Li, Qiang, and Jaroszynski, Jan. Two-Fold Reduction of Jc Anisotropy in FeSe0.5Te0.5 Films Using Low-Energy Proton Irradiation.  United States: N. p., 2019. 
Web.  doi:10.1109/tasc.2019.2900615.

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                    Ozaki, Toshinori, Li, Qiang, & Jaroszynski, Jan. Two-Fold Reduction of Jc Anisotropy in FeSe0.5Te0.5 Films Using Low-Energy Proton Irradiation.  United States.  https://doi.org/10.1109/tasc.2019.2900615

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                    Ozaki, Toshinori, Li, Qiang, and Jaroszynski, Jan. Thu .  
"Two-Fold Reduction of Jc Anisotropy in FeSe0.5Te0.5 Films Using Low-Energy Proton Irradiation".  United States.  https://doi.org/10.1109/tasc.2019.2900615.  https://www.osti.gov/servlets/purl/1506635.

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@article{osti_1506635,

  title        = {Two-Fold Reduction of Jc Anisotropy in FeSe0.5Te0.5 Films Using Low-Energy Proton Irradiation},

  author       = {Ozaki, Toshinori and Li, Qiang and Jaroszynski, Jan},

  abstractNote = {High in-field performance and low anisotropy of critical current density Jc are important for superconducting wires/tapes in rotating machine and magnet applications. Here, we report measurements of angular dependence of critical current density Jc in pro-ton irradiated FeSe0.5Te0.5 (FST) films at magnetic field up to 35 T. Here, we observed two-fold reduction in the Jc anisotropy of FST films at 4.2 K and 15 Tesla magnetic field by irradiation with low-energy (190 keV) proton. In light of recent demonstration of roll-to-roll irradiation process successfully incorporated in the standard 2G HTS long length production wire, low-energy proton irradiation can be a practical solution to enhance the performance of iron-based super-conducting wires and tapes, as low-energy ion sources are inexpensive to operate and are readily available commercially.},

  doi          = {10.1109/tasc.2019.2900615},

  journal      = {IEEE Transactions on Applied Superconductivity},

  number       = 51,

  volume       = 29,

  place        = {United States},

  year         = {Thu Aug 01 00:00:00 EDT 2019},

  month        = {Thu Aug 01 00:00:00 EDT 2019}

}

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Figures / Tables:

Fig. 1: (a) Angular field dependence of the critical current density J_c at 4.2 K for the 190 keV proton-irradiated FeSe_0.5Te_0.5 films at 15, 25, and 30 T. (b) Angular field dependence of the normalized critical current density J_c(θ)/ J_c(90°) at 4.2 K for the same films at 15, 25,more »

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Title: Two-Fold Reduction of Jc Anisotropy in FeSe0.5Te0.5 Films Using Low-Energy Proton Irradiation

Abstract

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Title: Two-Fold Reduction of J_c Anisotropy in FeSe_0.5Te_0.5 Films Using Low-Energy Proton Irradiation