Transport properties of PrFeAsO

Ishikado, Motoyuki; Shamoto, Shinichi  ; Kito, Hijiri*; Iyo, Akira*; Eisaki, Hiroshi*; Tomioka, Yasuhide*; Ito, Toshimitsu*

Since the discovery of iron-based superconductor, extensive research have been done in order to clarify mechanism of superconductivity. But the research have been done mainly on 122 system because of easy availability of single crystal. So far, we have succeeded to grow single crystals of PrFeAsO high-Tc superconductor by high-pressure synthesis method. In the previous talk, we succeeded to control doping by tuning oxygen content of the single crystals, and characterized anisotropy by resistivity measurement under magnetic field. And reported that the anisotropy of iron-based superconductor dose not depend on doping different from cuprates. This time, we measure transport properties, especially for doping dependences of Hall coefficient, and discuss relationship between Hall coefficient and SDW transition on underdoping regime.