Enhancement of critical current densities by high-pressure sintering in (Sr,K)Fe2As2 PIT wires

Sunseng Pyon; Yuji Tsuchiya; Hiroshi Inoue; Hideki Kajitani; Norikiyo Koizumi; Satoshi Awaji; Kazuo Watanabe; Tsuyoshi Tamegai

doi:10.1088/0953-2048/27/9/095002

Enhancement of critical current densities by high-pressure sintering in (Sr,K)Fe_2As2 PIT wires

Sunseng Pyon, Yuji Tsuchiya, Hiroshi Inoue, Hideki Kajitani, Norikiyo Koizumi, Satoshi Awaji, Kazuo Watanabe, Tsuyoshi Tamegai

High Field Laboratory for Superconducting Materials

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

30 Citations (Scopus)

Abstract

We have fabricated (Sr,K)Fe_2As2 superconducting wire through a powder-in-tube method that is combined with a hot isostatic pressing technique. The transport J _c in the wire at 4.2 K has reached 1.0 × 10⁵ A cm^-2 under self-field, and 9.4 × 10 ³ A cm^-2 at 100 kOe. This is the first report that the transport J_c reaches 1 × 10⁵ A cm^-2 in a (Sr,K)Fe_2As2 round wire. Magneto-optical imaging of the wire has confirmed the large intergranular critical current density in the wire core. The microstructure and compositional analyses imply that there is room for improvement of the J_c value through the optimization of the wire fabrication process.

Original language	English
Article number	095002
Journal	Superconductor Science and Technology
Volume	27
Issue number	9
DOIs	https://doi.org/10.1088/0953-2048/27/9/095002
Publication status	Published - 2014 Sep 1

Keywords

(Sr,K)Fe2As2
critical current density
hot isostatic pressing
magneto-optical imaging
powder in tube (PIT)
superconducting wires

ASJC Scopus subject areas

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

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Enhancement of critical current densities by high-pressure sintering in (Sr,K)Fe_2As2 PIT wires. / Pyon, Sunseng; Tsuchiya, Yuji; Inoue, Hiroshi; Kajitani, Hideki; Koizumi, Norikiyo; Awaji, Satoshi; Watanabe, Kazuo; Tamegai, Tsuyoshi.

In: Superconductor Science and Technology, Vol. 27, No. 9, 095002, 01.09.2014.

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

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abstract = "We have fabricated (Sr,K)Fe2As2 superconducting wire through a powder-in-tube method that is combined with a hot isostatic pressing technique. The transport J c in the wire at 4.2 K has reached 1.0 × 105 A cm-2 under self-field, and 9.4 × 10 3 A cm-2 at 100 kOe. This is the first report that the transport Jc reaches 1 × 105 A cm-2 in a (Sr,K)Fe2As2 round wire. Magneto-optical imaging of the wire has confirmed the large intergranular critical current density in the wire core. The microstructure and compositional analyses imply that there is room for improvement of the Jc value through the optimization of the wire fabrication process.",

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AU - Pyon, Sunseng

AU - Tsuchiya, Yuji

AU - Inoue, Hiroshi

AU - Kajitani, Hideki

AU - Koizumi, Norikiyo

AU - Awaji, Satoshi

AU - Watanabe, Kazuo

AU - Tamegai, Tsuyoshi

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AB - We have fabricated (Sr,K)Fe2As2 superconducting wire through a powder-in-tube method that is combined with a hot isostatic pressing technique. The transport J c in the wire at 4.2 K has reached 1.0 × 105 A cm-2 under self-field, and 9.4 × 10 3 A cm-2 at 100 kOe. This is the first report that the transport Jc reaches 1 × 105 A cm-2 in a (Sr,K)Fe2As2 round wire. Magneto-optical imaging of the wire has confirmed the large intergranular critical current density in the wire core. The microstructure and compositional analyses imply that there is room for improvement of the Jc value through the optimization of the wire fabrication process.

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