Figure 2

(a) Powder X-ray diffraction patterns of Ba3(FeS4)Br. (b) Solid state UV-Vis spectrum of Ba3(FeS4)Br. (c) Temperature dependence of the resistance of Ba3(FeS4)Br. Inset: ln(R) vs T−1/4 plot of the VRH model. (d) Temperature dependence of the magnetization of Ba3(FeS4)Br. Inset: The inverse magnetic susceptibility vs temperature plot. The red line is the linear fit of the magnetic susceptibility data from 400 K to 150 K.