Effect of the indium addition on the superconducting property and the impurity phase in polycrystalline SmFeAsO1-xFx

Masaya Fujioka; Toshinori Ozaki; Hiroyuki Okazaki; Saleem James Denholme; Keita Deguchi; Satoshi Demura; Hiroshi Hara; Tohru Watanabe; Hiroyuki Takeya; Takahide Yamaguchi; Hiroaki Kumakura; Yoshihiko Takano

doi:10.7566/JPSJ.82.024705

Effect of the indium addition on the superconducting property and the impurity phase in polycrystalline SmFeAsO_1-xF_x

Masaya Fujioka, Toshinori Ozaki, Hiroyuki Okazaki, Saleem James Denholme, Keita Deguchi, Satoshi Demura, Hiroshi Hara, Tohru Watanabe, Hiroyuki Takeya, Takahide Yamaguchi, Hiroaki Kumakura, Yoshihiko Takano

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

7 Citations (Scopus)

Abstract

We report the increase in the magnetic critical current density (J _c) of indium added polycrystalline SmFeAsO_1-xF _x. The value of magnetic J_c is around 2.5 × 10 ⁴ A/cm² at 4.2K under a self-magnetic field. Polycrystalline SmFeAsO_1-xF_x is mainly composed of superconducting grains and a little amorphous FeAs compounds. These components randomly coexist and amorphous areas are located between superconducting grains. Therefore, superconducting current is prevented from flowing by the amorphous areas. In this study, it is found that indium addition to polycrystalline SmFeAsO_1-xF_x removes these amorphous areas and induces the clustering of the superconducting grains. This means that the total contact surface area of grains increases. We suggest that the increase in the magnetic J_c is a direct effect of the indium addition.

Original language	English
Article number	024705
Journal	journal of the physical society of japan
Volume	82
Issue number	2
DOIs	https://doi.org/10.7566/JPSJ.82.024705
Publication status	Published - 2013 Feb

Keywords

Bulk
Critical current Density
Indium
Iron-based superconductor
Metal addition
SmFeAsOF
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.7566/JPSJ.82.024705

Cite this

Fujioka, M., Ozaki, T., Okazaki, H., Denholme, S. J., Deguchi, K., Demura, S., Hara, H., Watanabe, T., Takeya, H., Yamaguchi, T., Kumakura, H., & Takano, Y. (2013). Effect of the indium addition on the superconducting property and the impurity phase in polycrystalline SmFeAsO_1-xF_x. journal of the physical society of japan, 82(2), [024705]. https://doi.org/10.7566/JPSJ.82.024705

Fujioka, M, Ozaki, T, Okazaki, H, Denholme, SJ, Deguchi, K, Demura, S, Hara, H, Watanabe, T, Takeya, H, Yamaguchi, T, Kumakura, H & Takano, Y 2013, 'Effect of the indium addition on the superconducting property and the impurity phase in polycrystalline SmFeAsO_1-xF_x', journal of the physical society of japan, vol. 82, no. 2, 024705. https://doi.org/10.7566/JPSJ.82.024705

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title = "Effect of the indium addition on the superconducting property and the impurity phase in polycrystalline SmFeAsO1-xFx",

abstract = "We report the increase in the magnetic critical current density (J c) of indium added polycrystalline SmFeAsO1-xF x. The value of magnetic Jc is around 2.5 × 10 4 A/cm2 at 4.2K under a self-magnetic field. Polycrystalline SmFeAsO1-xFx is mainly composed of superconducting grains and a little amorphous FeAs compounds. These components randomly coexist and amorphous areas are located between superconducting grains. Therefore, superconducting current is prevented from flowing by the amorphous areas. In this study, it is found that indium addition to polycrystalline SmFeAsO1-xFx removes these amorphous areas and induces the clustering of the superconducting grains. This means that the total contact surface area of grains increases. We suggest that the increase in the magnetic Jc is a direct effect of the indium addition.",

keywords = "Bulk, Critical current Density, Indium, Iron-based superconductor, Metal addition, SmFeAsOF, Superconductivity",

author = "Masaya Fujioka and Toshinori Ozaki and Hiroyuki Okazaki and Denholme, {Saleem James} and Keita Deguchi and Satoshi Demura and Hiroshi Hara and Tohru Watanabe and Hiroyuki Takeya and Takahide Yamaguchi and Hiroaki Kumakura and Yoshihiko Takano",

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AU - Fujioka, Masaya

AU - Ozaki, Toshinori

AU - Okazaki, Hiroyuki

AU - Denholme, Saleem James

AU - Deguchi, Keita

AU - Demura, Satoshi

AU - Hara, Hiroshi

AU - Watanabe, Tohru

AU - Takeya, Hiroyuki

AU - Yamaguchi, Takahide

AU - Kumakura, Hiroaki

AU - Takano, Yoshihiko

PY - 2013/2

Y1 - 2013/2

N2 - We report the increase in the magnetic critical current density (J c) of indium added polycrystalline SmFeAsO1-xF x. The value of magnetic Jc is around 2.5 × 10 4 A/cm2 at 4.2K under a self-magnetic field. Polycrystalline SmFeAsO1-xFx is mainly composed of superconducting grains and a little amorphous FeAs compounds. These components randomly coexist and amorphous areas are located between superconducting grains. Therefore, superconducting current is prevented from flowing by the amorphous areas. In this study, it is found that indium addition to polycrystalline SmFeAsO1-xFx removes these amorphous areas and induces the clustering of the superconducting grains. This means that the total contact surface area of grains increases. We suggest that the increase in the magnetic Jc is a direct effect of the indium addition.

AB - We report the increase in the magnetic critical current density (J c) of indium added polycrystalline SmFeAsO1-xF x. The value of magnetic Jc is around 2.5 × 10 4 A/cm2 at 4.2K under a self-magnetic field. Polycrystalline SmFeAsO1-xFx is mainly composed of superconducting grains and a little amorphous FeAs compounds. These components randomly coexist and amorphous areas are located between superconducting grains. Therefore, superconducting current is prevented from flowing by the amorphous areas. In this study, it is found that indium addition to polycrystalline SmFeAsO1-xFx removes these amorphous areas and induces the clustering of the superconducting grains. This means that the total contact surface area of grains increases. We suggest that the increase in the magnetic Jc is a direct effect of the indium addition.

KW - Bulk

KW - Critical current Density

KW - Indium

KW - Iron-based superconductor

KW - Metal addition

KW - SmFeAsOF

KW - Superconductivity

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