Synthesis and Properties of 5d Electron-Doped CeFe1−x Ir x AsO Compounds

• DOI: 10.1007/s10948-014-2830-7
• Publication Date: 2014-10-02T08:09:08Z
• Authors: S. H. Yang; Y. J. Cui; C. Y. Su; Y. L. Chen; C. H. Cheng; Y. Zhao
• Keywords: 02 engineering and technology; 0210 nano-technology

The nonmagnetic 5d transition metal Ir has been successfully doped at Fe site in CeFeAsO using a solid-state reaction method. The synthesized CeFe1−x Ir x AsO (x = 0, 0.05, 0.1, 0.15, 0.2) compounds possess the tetragonal ZrCuSiAs-type structure with the space group P4/nmm. It can be observed that the spin-density wave in CeFeAsO is definitely suppressed by Ir doping. Different from the cases in SmFeAsO and GdFeAsO, Ir doping in CeFeAsO can not induce superconductivity down to 5 K, instead, semiconductor-like behavior is observed in the present system.