Enhancement of critical current density in a Ca0.85La0.15Fe(As0.92Sb0.08)2 superconductor with Tc = 47 K through 3 MeV proton irradiation

Akiyoshi Park; Akinori Mine; Tatsuhiro Yamada; Fumiaki Ohtake; Hiroki Akiyama; Yue Sun; Sunseng Pyon; Tsuyoshi Tamegai; Yutaka Kitahama; Tasuku Mizukami; Kazutaka Kudo; Minoru Nohara; Hisashi Kitamura

doi:10.1088/0953-2048/29/5/055006

Enhancement of critical current density in a Ca_0.85La_0.15Fe(As_0.92Sb_0.08)₂ superconductor with T_c = 47 K through 3 MeV proton irradiation

Akiyoshi Park, Akinori Mine, Tatsuhiro Yamada, Fumiaki Ohtake, Hiroki Akiyama, Yue Sun, Sunseng Pyon, Tsuyoshi Tamegai, Yutaka Kitahama, Tasuku Mizukami, Kazutaka Kudo, Minoru Nohara, Hisashi Kitamura

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

5 Citations (Scopus)

Abstract

We examine the critical current density (J_c) of Ca_1-xLa_xFe(As_1-ySb_y)₂, a 112-type iron-based superconductor (IBS) with T_c = 47 K, via magneto-optical imaging and magnetization measurements. We assert that the large self-field J_c of 2.0 × 10⁶ A cm^-2 at 2 K is a strong indication that it is a bulk superconductor with spatially homogeneous superconductivity. A 2.8-fold enhancement in J_c to 6.2 × 10⁶ A cm^-2 was achieved through artificially engineering pinning centers by irradiating 3 MeV protons with a total dosage of 1.0 × 10¹⁶ cm^-2. The results not only demonstrate the potential of 112-type IBSs for application but also enrich the current understanding of the role of artificial defects in IBSs.

Original language	English
Article number	055006
Journal	Superconductor Science and Technology
Volume	29
Issue number	5
DOIs	https://doi.org/10.1088/0953-2048/29/5/055006
Publication status	Published - Mar 29 2016

Keywords

critical current density
iron-based superconductor
magneto-optical imaging
particle irradiation

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1088/0953-2048/29/5/055006

Cite this

Park, A., Mine, A., Yamada, T., Ohtake, F., Akiyama, H., Sun, Y., Pyon, S., Tamegai, T., Kitahama, Y., Mizukami, T., Kudo, K., Nohara, M., & Kitamura, H. (2016). Enhancement of critical current density in a Ca_0.85La_0.15Fe(As_0.92Sb_0.08)₂ superconductor with T_c = 47 K through 3 MeV proton irradiation. Superconductor Science and Technology, 29(5), [055006]. https://doi.org/10.1088/0953-2048/29/5/055006

Park, A, Mine, A, Yamada, T, Ohtake, F, Akiyama, H, Sun, Y, Pyon, S, Tamegai, T, Kitahama, Y, Mizukami, T, Kudo, K, Nohara, M & Kitamura, H 2016, 'Enhancement of critical current density in a Ca_0.85La_0.15Fe(As_0.92Sb_0.08)₂ superconductor with T_c = 47 K through 3 MeV proton irradiation', Superconductor Science and Technology, vol. 29, no. 5, 055006. https://doi.org/10.1088/0953-2048/29/5/055006

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title = "Enhancement of critical current density in a Ca0.85La0.15Fe(As0.92Sb0.08)2 superconductor with Tc = 47 K through 3 MeV proton irradiation",

abstract = "We examine the critical current density (Jc) of Ca1-xLaxFe(As1-ySby)2, a 112-type iron-based superconductor (IBS) with Tc = 47 K, via magneto-optical imaging and magnetization measurements. We assert that the large self-field Jc of 2.0 × 106 A cm-2 at 2 K is a strong indication that it is a bulk superconductor with spatially homogeneous superconductivity. A 2.8-fold enhancement in Jc to 6.2 × 106 A cm-2 was achieved through artificially engineering pinning centers by irradiating 3 MeV protons with a total dosage of 1.0 × 1016 cm-2. The results not only demonstrate the potential of 112-type IBSs for application but also enrich the current understanding of the role of artificial defects in IBSs.",

keywords = "critical current density, iron-based superconductor, magneto-optical imaging, particle irradiation",

author = "Akiyoshi Park and Akinori Mine and Tatsuhiro Yamada and Fumiaki Ohtake and Hiroki Akiyama and Yue Sun and Sunseng Pyon and Tsuyoshi Tamegai and Yutaka Kitahama and Tasuku Mizukami and Kazutaka Kudo and Minoru Nohara and Hisashi Kitamura",

note = "Funding Information: This research was performed as a part of the Research Project with Heavy Ions at NIRS-HIMAC. YS gratefully appreciates the support from the Japan Society for the Promotion of Science. This work was partially supported by Grants-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) and the Japan Society for the Promotion of Science (JSPS) (Grants No. 25400372, No. 26287082, and No. 15H01047). Publisher Copyright: {\textcopyright} 2016 IOP Publishing Ltd.",

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AU - Park, Akiyoshi

AU - Mine, Akinori

AU - Yamada, Tatsuhiro

AU - Ohtake, Fumiaki

AU - Akiyama, Hiroki

AU - Sun, Yue

AU - Pyon, Sunseng

AU - Tamegai, Tsuyoshi

AU - Kitahama, Yutaka

AU - Mizukami, Tasuku

AU - Kudo, Kazutaka

AU - Nohara, Minoru

AU - Kitamura, Hisashi

N1 - Funding Information: This research was performed as a part of the Research Project with Heavy Ions at NIRS-HIMAC. YS gratefully appreciates the support from the Japan Society for the Promotion of Science. This work was partially supported by Grants-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) and the Japan Society for the Promotion of Science (JSPS) (Grants No. 25400372, No. 26287082, and No. 15H01047). Publisher Copyright: © 2016 IOP Publishing Ltd.

PY - 2016/3/29

Y1 - 2016/3/29

N2 - We examine the critical current density (Jc) of Ca1-xLaxFe(As1-ySby)2, a 112-type iron-based superconductor (IBS) with Tc = 47 K, via magneto-optical imaging and magnetization measurements. We assert that the large self-field Jc of 2.0 × 106 A cm-2 at 2 K is a strong indication that it is a bulk superconductor with spatially homogeneous superconductivity. A 2.8-fold enhancement in Jc to 6.2 × 106 A cm-2 was achieved through artificially engineering pinning centers by irradiating 3 MeV protons with a total dosage of 1.0 × 1016 cm-2. The results not only demonstrate the potential of 112-type IBSs for application but also enrich the current understanding of the role of artificial defects in IBSs.

AB - We examine the critical current density (Jc) of Ca1-xLaxFe(As1-ySby)2, a 112-type iron-based superconductor (IBS) with Tc = 47 K, via magneto-optical imaging and magnetization measurements. We assert that the large self-field Jc of 2.0 × 106 A cm-2 at 2 K is a strong indication that it is a bulk superconductor with spatially homogeneous superconductivity. A 2.8-fold enhancement in Jc to 6.2 × 106 A cm-2 was achieved through artificially engineering pinning centers by irradiating 3 MeV protons with a total dosage of 1.0 × 1016 cm-2. The results not only demonstrate the potential of 112-type IBSs for application but also enrich the current understanding of the role of artificial defects in IBSs.

KW - critical current density

KW - iron-based superconductor

KW - magneto-optical imaging

KW - particle irradiation

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