Magneto-optical characterization of iron-based superconducting wires and tapes

T. Tamegai; Q. P. Ding; H. Inoue; T. Taen; Y. Tsuchiya; S. Mohan; Y. Sun; T. Prombood; Y. Nakajima

doi:10.1109/TASC.2012.2235133

Magneto-optical characterization of iron-based superconducting wires and tapes

T. Tamegai, Q. P. Ding, H. Inoue, T. Taen, Y. Tsuchiya, S. Mohan, Y. Sun, T. Prombood, Y. Nakajima

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

5 Citations (Scopus)

Abstract

The critical current density, J_c, in high-quality single crystals of iron-based superconductors (IBS) has reached larger than 10 ⁵A/cm² at 4.2 K. This large value of J_c urged the development of potential superconducting wires or tapes based on IBS. We have fabricated superconducting wires and tapes of IBS using several techniques and made an extensive characterization by structural, transport, and magnetic measurements. The powder-in-tube method is used for (Ba, K)Fe₂As ₂ and Ba(Fe, Co)₂As₂ wires and the diffusion method is used for FeSe tape. Intra-and inter-granular J_{\rm c} 's have been evaluated by direct transport and indirect magnetization measurements as well as using magneto-optical (MO) imaging. The intergranular J_c's at 4.2 K under self-field for (Ba, K)Fe₂As₂ and Ba(Fe, Co)₂As₂ wires and FeSe tapes are 1.3 × 10 ⁴A/cm², 3.8 × 10³A/cm², and 600 A/cm², respectively. On the other hand, MO images have demonstrated that the intragranular J_c is at least one order of magnitude larger than the intergranular J_c, which is consistent with the magnetic evaluation.

Original language	English
Article number	6387296
Journal	IEEE Transactions on Applied Superconductivity
Volume	23
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2012.2235133
Publication status	Published - 2013
Externally published	Yes

Keywords

Critical current density
homogeneity
iron-based superconductors
magneto-optical imaging

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TASC.2012.2235133

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title = "Magneto-optical characterization of iron-based superconducting wires and tapes",

abstract = "The critical current density, Jc, in high-quality single crystals of iron-based superconductors (IBS) has reached larger than 10 5A/cm2 at 4.2 K. This large value of Jc urged the development of potential superconducting wires or tapes based on IBS. We have fabricated superconducting wires and tapes of IBS using several techniques and made an extensive characterization by structural, transport, and magnetic measurements. The powder-in-tube method is used for (Ba, K)Fe2As 2 and Ba(Fe, Co)2As2 wires and the diffusion method is used for FeSe tape. Intra-and inter-granular J\rm c 's have been evaluated by direct transport and indirect magnetization measurements as well as using magneto-optical (MO) imaging. The intergranular Jc's at 4.2 K under self-field for (Ba, K)Fe2As2 and Ba(Fe, Co)2As2 wires and FeSe tapes are 1.3 × 10 4A/cm2, 3.8 × 103A/cm2, and 600 A/cm2, respectively. On the other hand, MO images have demonstrated that the intragranular Jc is at least one order of magnitude larger than the intergranular Jc, which is consistent with the magnetic evaluation.",

keywords = "Critical current density, homogeneity, iron-based superconductors, magneto-optical imaging",

author = "T. Tamegai and Ding, {Q. P.} and H. Inoue and T. Taen and Y. Tsuchiya and S. Mohan and Y. Sun and T. Prombood and Y. Nakajima",

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doi = "10.1109/TASC.2012.2235133",

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T1 - Magneto-optical characterization of iron-based superconducting wires and tapes

AU - Tamegai, T.

AU - Ding, Q. P.

AU - Inoue, H.

AU - Taen, T.

AU - Tsuchiya, Y.

AU - Mohan, S.

AU - Sun, Y.

AU - Prombood, T.

AU - Nakajima, Y.

PY - 2013

Y1 - 2013

N2 - The critical current density, Jc, in high-quality single crystals of iron-based superconductors (IBS) has reached larger than 10 5A/cm2 at 4.2 K. This large value of Jc urged the development of potential superconducting wires or tapes based on IBS. We have fabricated superconducting wires and tapes of IBS using several techniques and made an extensive characterization by structural, transport, and magnetic measurements. The powder-in-tube method is used for (Ba, K)Fe2As 2 and Ba(Fe, Co)2As2 wires and the diffusion method is used for FeSe tape. Intra-and inter-granular J\rm c 's have been evaluated by direct transport and indirect magnetization measurements as well as using magneto-optical (MO) imaging. The intergranular Jc's at 4.2 K under self-field for (Ba, K)Fe2As2 and Ba(Fe, Co)2As2 wires and FeSe tapes are 1.3 × 10 4A/cm2, 3.8 × 103A/cm2, and 600 A/cm2, respectively. On the other hand, MO images have demonstrated that the intragranular Jc is at least one order of magnitude larger than the intergranular Jc, which is consistent with the magnetic evaluation.

AB - The critical current density, Jc, in high-quality single crystals of iron-based superconductors (IBS) has reached larger than 10 5A/cm2 at 4.2 K. This large value of Jc urged the development of potential superconducting wires or tapes based on IBS. We have fabricated superconducting wires and tapes of IBS using several techniques and made an extensive characterization by structural, transport, and magnetic measurements. The powder-in-tube method is used for (Ba, K)Fe2As 2 and Ba(Fe, Co)2As2 wires and the diffusion method is used for FeSe tape. Intra-and inter-granular J\rm c 's have been evaluated by direct transport and indirect magnetization measurements as well as using magneto-optical (MO) imaging. The intergranular Jc's at 4.2 K under self-field for (Ba, K)Fe2As2 and Ba(Fe, Co)2As2 wires and FeSe tapes are 1.3 × 10 4A/cm2, 3.8 × 103A/cm2, and 600 A/cm2, respectively. On the other hand, MO images have demonstrated that the intragranular Jc is at least one order of magnitude larger than the intergranular Jc, which is consistent with the magnetic evaluation.

KW - Critical current density

KW - homogeneity

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Magneto-optical characterization of iron-based superconducting wires and tapes

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