Superconducting properties of BiS2 based superconductor NdO1-xFxBiS2   (x=0 to 0.9)
  We report the phase diagram of NdO1-xFxBiS2 (x=0.1, 0.3, 0.5, 0.7, 0.9) compound. The samples synthesized by the vacuum encapsulation technique are crystallized in a tetragonal P4/nmm space group. The superconductivity of all samples is confirmed by DC magnetic susceptibility and electrical transport measurements. The maximum Tc of 5.25K is seen for x = 0.7 sample. The upper critical field is calculated from magneto transport measurements. The Thermal activated flux flow - TAFF studies are also carried out. Hall measurements show that electrons are the dominating charge carriers in these systems. 
Rajveer Jha, and V.P.S. Awana
cond-mat.supr-con