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

Research output: Contribution to journalArticle

4 Citations (Scopus)

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.

Original languageEnglish
Article number055006
JournalSuperconductor Science and Technology
Volume29
Issue number5
DOIs
Publication statusPublished - Mar 29 2016

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Critical current density (superconductivity)
Proton irradiation
proton irradiation
Superconductivity
Superconducting materials
Protons
Magnetization
critical current
current density
Imaging techniques
Defects
augmentation
indication
superconductivity
engineering
iron
dosage
magnetization
protons
defects

Keywords

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

ASJC Scopus subject areas

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

Cite this

Enhancement of critical current density in a Ca0.85La0.15Fe(As0.92Sb0.08)2 superconductor with Tc = 47 K through 3 MeV proton irradiation. / Park, Akiyoshi; Mine, Akinori; Yamada, Tatsuhiro; Ohtake, Fumiaki; Akiyama, Hiroki; Sun, Yue; Pyon, Sunseng; Tamegai, Tsuyoshi; Kitahama, Yutaka; Mizukami, Tasuku; Kudo, Kazutaka; Nohara, Minoru; Kitamura, Hisashi.

In: Superconductor Science and Technology, Vol. 29, No. 5, 055006, 29.03.2016.

Research output: Contribution to journalArticle

Park, Akiyoshi ; Mine, Akinori ; Yamada, Tatsuhiro ; Ohtake, Fumiaki ; Akiyama, Hiroki ; Sun, Yue ; Pyon, Sunseng ; Tamegai, Tsuyoshi ; Kitahama, Yutaka ; Mizukami, Tasuku ; Kudo, Kazutaka ; Nohara, Minoru ; Kitamura, Hisashi. / Enhancement of critical current density in a Ca0.85La0.15Fe(As0.92Sb0.08)2 superconductor with Tc = 47 K through 3 MeV proton irradiation. In: Superconductor Science and Technology. 2016 ; Vol. 29, No. 5.
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AU - Ohtake, Fumiaki

AU - Akiyama, Hiroki

AU - Sun, Yue

AU - Pyon, Sunseng

AU - Tamegai, Tsuyoshi

AU - Kitahama, Yutaka

AU - Mizukami, Tasuku

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