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Coexistence of superconductivity and ferromagnetism in Sr0.5Ce0.5FBiS2

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arxiv 1407.3711 v3 pith:YKOMESFD submitted 2014-07-14 cond-mat.supr-con

Lin Li , Yuke Li , Yuefeng Jin , Haoran Huang , Bin Chen , Xiaofeng Xu , Jianhui Dai , Li Zhang
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Xiaojun Yang Huifei Zhai Guanghan Cao Zhuan Xu
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classification cond-mat.supr-con
keywords belowheatsuperconductivitytemperaturetransitiontransportbulkcapacity
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abstract

Through the combination of X-ray diffraction, electrical transport, magnetic susceptibility, and the heat capacity measurements, we studied the effect of Ce doping in the newly discovered SrFBiS${2}$ system. It is found that Sr${0.5}$Ce${0.5}$FBiS${2}$ undergoes a second-order transition below $7.5 K, followed by a superconducting transition with the critical temperature Tc=2.8 K. Our transport, specific heat and DC-magnetization results suggest the presence of bulk ferromagneticcorrelation of Ce ion below 7.5 K that coexist with superconductivity when the temperature is further lowered below 2.8 K.

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