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Coexistence of bulk superconductivity and ferromagnetism in CeO1-xFxBiS2

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arxiv 1311.4267 v1 pith:M6WC5X5E submitted 2013-11-18 cond-mat.supr-con

Satoshi Demura , Keita Deguchi , Yoshikazu Mizuguchi , Kazuki Sato , Ryouta Honjyo , Aichi Yamashita , Takuma Yamaki , Hiroshi Hara
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Tohru Watanabe Saleem J. Denholme Masaya Fujioka Hiroyuki Okazaki Toshinori Ozaki Osuke Miura Takahide Yamaguchi Hiroyuki Takeya Yoshihiko Takano
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classification cond-mat.supr-con
keywords ferromagnetismceo1-xfxbis2superconductivitybulkcoexistencelayerssubstitutionsuperconducting
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We show the observation of the coexistence of bulk superconductivity and ferromagnetism in CeO1-xFxBiS2(x = 0 - 1.0) prepared by annealing under high-pressure. In CeO1-xFxBiS2 system, both superconductivity and two types of ferromagnetism with respective magnetic transition temperatures of 4.5 K and 7.5 K are induced upon systematic F substitution. This fact suggests that carriers generated by the substitution of O by F are supplied to not only the BiS2 superconducting layers but also the CeO blocking layers. Furthermore, the highest superconducting transition temperature is observed when the ferromagnetism is also enhanced, which implies that superconductivity and ferromagnetism are linked to each other in the CeO1-xFxBiS2 system.

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