High critical current density and low anisotropy in textured Sr1-xKxFe2As2 tapes for high field applications

Zhaoshun Gao; Yanwei Ma; Chao Yao; Xianping Zhang; Chunlei Wang; Dongliang Wang; Satoshi Awaji; Kazuo Watanabe

doi:10.1038/srep00998

High critical current density and low anisotropy in textured Sr1-xKxFe2As2 tapes for high field applications

Zhaoshun Gao, Yanwei Ma, Chao Yao, Xianping Zhang, Chunlei Wang, Dongliang Wang, Satoshi Awaji, Kazuo Watanabe

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

62 Scopus citations

Abstract

From the application point of view, large critical current densities J c (H) for superconducting wires are required, preferably for magnetic fields higher than 5 T. Here we show that strong c-axis textured Sr 1-xKxFe2As2 tapes with nearly isotropic transport J c were fabricated by an ex-situ powder-in-tube (PIT) process. At 4.2 K, the J c values show extremely weak magnetic field dependence and reach high values of 1.7×104 A/cm2 at 10 T and 1.4×104 A/cm2 at 14 T, respectively, these values are by far the highest ever reported for iron based wires and approach the J c level desired for practical applications. Transmission electron microscopy investigations revealed that amorphous oxide layers at grain boundaries were significantly reduced by Sn addition which resulted in greatly improved intergranular connectivity. Our results demonstrated the strong potential of using iron based superconductors for high field applications.

Original language	English (US)
Journal	SCIENTIFIC REPORTS
Volume	2
Issue number	1
DOIs	https://doi.org/10.1038/srep00998
State	Published - 2012
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2021-09-21
Acknowledgements: The authors thank Drs. Qingxiao Wang and XiXiang Zhang at the KAUST for the TEM investigation. They are also indebted to Dr. Ma at ANL for useful suggestion. This work is partially supported by the National ‘973’ Program (Grant No. 2011CBA00105) and National Natural Science Foundation of China (Grant No. 51002150 and 51025726).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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10.1038/srep00998

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@article{226708dba877423ba51c808f6231c8ea,

title = "High critical current density and low anisotropy in textured Sr1-xKxFe2As2 tapes for high field applications",

abstract = "From the application point of view, large critical current densities J c (H) for superconducting wires are required, preferably for magnetic fields higher than 5 T. Here we show that strong c-axis textured Sr 1-xKxFe2As2 tapes with nearly isotropic transport J c were fabricated by an ex-situ powder-in-tube (PIT) process. At 4.2 K, the J c values show extremely weak magnetic field dependence and reach high values of 1.7×104 A/cm2 at 10 T and 1.4×104 A/cm2 at 14 T, respectively, these values are by far the highest ever reported for iron based wires and approach the J c level desired for practical applications. Transmission electron microscopy investigations revealed that amorphous oxide layers at grain boundaries were significantly reduced by Sn addition which resulted in greatly improved intergranular connectivity. Our results demonstrated the strong potential of using iron based superconductors for high field applications.",

author = "Zhaoshun Gao and Yanwei Ma and Chao Yao and Xianping Zhang and Chunlei Wang and Dongliang Wang and Satoshi Awaji and Kazuo Watanabe",

note = "KAUST Repository Item: Exported on 2021-09-21 Acknowledgements: The authors thank Drs. Qingxiao Wang and XiXiang Zhang at the KAUST for the TEM investigation. They are also indebted to Dr. Ma at ANL for useful suggestion. This work is partially supported by the National {\textquoteleft}973{\textquoteright} Program (Grant No. 2011CBA00105) and National Natural Science Foundation of China (Grant No. 51002150 and 51025726). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2012",

doi = "10.1038/srep00998",

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volume = "2",

journal = "SCIENTIFIC REPORTS",

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T1 - High critical current density and low anisotropy in textured Sr1-xKxFe2As2 tapes for high field applications

AU - Gao, Zhaoshun

AU - Ma, Yanwei

AU - Yao, Chao

AU - Zhang, Xianping

AU - Wang, Chunlei

AU - Wang, Dongliang

AU - Awaji, Satoshi

AU - Watanabe, Kazuo

N1 - KAUST Repository Item: Exported on 2021-09-21 Acknowledgements: The authors thank Drs. Qingxiao Wang and XiXiang Zhang at the KAUST for the TEM investigation. They are also indebted to Dr. Ma at ANL for useful suggestion. This work is partially supported by the National ‘973’ Program (Grant No. 2011CBA00105) and National Natural Science Foundation of China (Grant No. 51002150 and 51025726). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2012

Y1 - 2012

N2 - From the application point of view, large critical current densities J c (H) for superconducting wires are required, preferably for magnetic fields higher than 5 T. Here we show that strong c-axis textured Sr 1-xKxFe2As2 tapes with nearly isotropic transport J c were fabricated by an ex-situ powder-in-tube (PIT) process. At 4.2 K, the J c values show extremely weak magnetic field dependence and reach high values of 1.7×104 A/cm2 at 10 T and 1.4×104 A/cm2 at 14 T, respectively, these values are by far the highest ever reported for iron based wires and approach the J c level desired for practical applications. Transmission electron microscopy investigations revealed that amorphous oxide layers at grain boundaries were significantly reduced by Sn addition which resulted in greatly improved intergranular connectivity. Our results demonstrated the strong potential of using iron based superconductors for high field applications.

AB - From the application point of view, large critical current densities J c (H) for superconducting wires are required, preferably for magnetic fields higher than 5 T. Here we show that strong c-axis textured Sr 1-xKxFe2As2 tapes with nearly isotropic transport J c were fabricated by an ex-situ powder-in-tube (PIT) process. At 4.2 K, the J c values show extremely weak magnetic field dependence and reach high values of 1.7×104 A/cm2 at 10 T and 1.4×104 A/cm2 at 14 T, respectively, these values are by far the highest ever reported for iron based wires and approach the J c level desired for practical applications. Transmission electron microscopy investigations revealed that amorphous oxide layers at grain boundaries were significantly reduced by Sn addition which resulted in greatly improved intergranular connectivity. Our results demonstrated the strong potential of using iron based superconductors for high field applications.

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High critical current density and low anisotropy in textured Sr1-xKxFe2As2 tapes for high field applications

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