Synthesis, structure and magnetic properties of new vanadate PbCo2V2O8

A new vanadate PbCo2V2O8 was obtained through the study of PbO–CoO–V2O5 ternary system. The crystal structure was determined by Rietveld method, indicating that PbCo2V2O8 has a tetragonal structure of space group I41cd with a spiral chain along the c-axis. Magnetic properties of the titled compound were investigated by means of susceptibility, magnetization, and heat capacity measurements. The results show that PbCo2V2O8 is a quasi-one-dimensional canted antiferromagnet with Neel temperature of ∼4 K, being consistent with its crystal structure.

A structural arrangement of isolated Co2+ ions in PbCo2V2O8 with spiral chain along the c-axis is clearly seen, where the nearest-neighbor chains screw adversely each other with right or left manner.Figure optionsDownload as PowerPoint slide