Superconductivity in a new quaternary phase with HgSm_(0.5)In_(0.5)Pb_2 composition

摘要

This work reports a systematic study on the structural and superconducting properties in the Hg-Sm-In-Pb system. It is investigated how In and Sm dopings influence the superconducting properties of the HgPb_2 phase which was recently reported. Results for the HgSm_(1-x)Pb_2 system show that Sm atoms substitute Hg vacancies in the tetragonal phase which do not affect the onset critical temperature of the HgPb_2 compound. Simultaneous Sm and In doping effects on the properties of the HgPb_2 phase are also studied. Experimental and simulations of X-ray powder diffractograms suggest that the HgSm_(1-x)In_xPb_2 system (0.2