CDW transition in Fe intercalated TiSe2

Polycrystalline TiSe2 and its Iron intercalated samples have been successfully grown by solid state synthesis method. The electrical transport property of pure sample is semiconducting in the entire temperature range with a clear anomaly depicting the onset of charge density wave (CDW) at 200K. Temperature that corresponds to CDW peak and CDW transition onset (TCDW-onset & TCDW-peak) decreases linearly with concentration of Iron (Fe). The 7.5% Fe intercalated sample shows a crossover from semiconductor to metallic nature at 145 K with linear contribution at high temperature side. Below 145K the resistance was fitted with -lnT contribution, which may be associated with Kondo like interactions due to the guest Fe moments with the conduction electrons of the host. However, the robustness of the resistance variation in magnetic fields point towards other mechanisms as well.