Synthesis,Structure and Property of New Intermetallic Compound:Ce_5AgBi_3

The title new compound Ce_5AgBi_3 was synthesized by arc melting method followed by annealing.The crystal structure refined using Rietveld method and X-ray powder diffraction data shows that it is similar to Hf_5CuSn_3 with space group p63/mcm (No.193).The unit cell parameters are a=b=9.7163(3)(?),c=6.6228(2)(?)and V=541.47(5)(?)~3.The structure is characterized by layers of Ce-Bi net formed by Ce and Bi at 6g position.Ce at 4f position and Ag at 2d position are separated in those two different kinds of Ce-Bi hexagon tunnels along c axes,respectively.Magnetism and specific heat property of Ce_5AgBi_3 are measured using PPMS.Ce_5AgBi_3 is antiferromagnetism and complies with Curie-Weiss law above T_N=3.8K.The calculated moment is 2.67μB,fitted well withμ_(eff) of Ce~(3+),which means that the magnetism of Ce_5AgBi_3 is mainly offered by Ce~(3+).