Coexistence of bulk superconductivity and ferromagnetism in CeO1-xFxBiS2

Authors :: Demura, Satoshi
Deguchi, Keita
Mizuguchi, Yoshikazu
Sato, Kazuki
Honjyo, Ryouta
Yamashita, Aichi
Yamaki, Takuma
Hara, Hiroshi
Watanabe, Tohru
Denholme, Saleem J.
Fujioka, Masaya
Okazaki, Hiroyuki
Ozaki, Toshinori
Miura, Osuke
Yamaguchi, Takahide
Takeya, Hiroyuki
Takano, Yoshihiko
Source :: J. Phys. Soc. Jpn., Vol.84, 024709 (2015)
Publication Year :: 2013
Abstract: 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.<br />Comment: 25 pages, 6 figures