Synthesis of Bi2(O,F)S2 superconductors by NaF treatment

Natsuumi TAKAHASHI; Masanori NAGAO; Akira MIURA; Satoshi WATAUCHI; Kiyoharu TADANAGA; Yoshihiko TAKANO; Isao TANAKA

doi:10.2109/jcersj2.17226

Journal of the Ceramic Society of Japan

Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535

Note

Synthesis of Bi₂(O,F)S₂ superconductors by NaF treatment

Natsuumi TAKAHASHI, Masanori NAGAO, Akira MIURA, Satoshi WATAUCHI, Kiyoharu TADANAGA, Yoshihiko TAKANO, Isao TANAKA

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Keywords: Fluorination, Layered superconductor

JOURNAL FREE ACCESS

2018 Volume 126 Issue 7 Pages 591-593

DOI https://doi.org/10.2109/jcersj2.17226

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Abstract

The layered compound Bi₂(O,F)S₂ is synthesized by NaF treatment. Heat treatment of Bi₂OS₂ with different amounts of NaF powder at 400°C produces Bi₂(O,F)S₂ superconductors. NaF is low-cost and stable fluorination sources when it is compared with other sources. NaF treatment increased the a-axis of Bi₂(O,F)S₂. Maximum superconducting transition temperature of obtained Bi₂(O,F)S₂ is 4.7 K.

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