Different doping effect on physical properties of non-magnetic Pt and Ga in CaFe4As3

We have successfully doped Pt and Ga into CaFe4As3 and investigated the structure and physical properties of CaFe3.64X0.36As3 (X = Pt, Ga). Two magnetic transition temperatures remain unchanged upon Pt or Ga doping, as confirmed by specific heat, electrical resistivity and magnetic susceptibility. The electrical resistivity of CaFe4As3 is reduced by approximately half with Pt dopant but increases by an order of magnitude with Ga doping, consistent with the changes in their Hall coefficients, which indicates the effects of Pt and Ga doping give us a different modification on physical properties and electronic structure in CaFe4As3.