Coexistence of superconductivity and ferromagnetism in Sr_0.5Ce_0.5FBiS_2-xSe_x (x = 0.5 and 1.0), a non-U material with T_c < T_FM.

ABSTRACT: We have carried out detailed magnetic and transport studies of the new Sr_0.5Ce_0.5FBiS_2-xSe_x (0.0 ≤ x ≤ 1.0) superconductors derived by doping Se in Sr_0.5Ce_0.5FBiS₂. Se-doping produces several effects: it suppresses semiconducting-like behavior observed in the undoped Sr_0.5Ce_0.5FBiS₂, the ferromagnetic ordering temperature, T_FM, decreases considerably from 7.5 K (in Sr_0.5Ce_0.5FBiS₂) to 3.5 K and the superconducting transition temperature, T_c, gets enhanced slightly to 2.9-3.3 K. Thus in these Se-doped materials, T_FM is marginally higher than T_c. Magnetization studies provide evidence of bulk superconductivi

SUBMITTER: Thakur GS 

PROVIDER: S-EPMC5124956 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature