Synthesis and Physical Properties of a Novel Layered Titanium Pnictide-Oxide

Abstract

A novel pnictide-oxide BaTi₂Sb₂O was synthesized by solid state reaction. XRD revealed that BaTi₂Sb₂O consists of alternate stacking Ba layers and Ti₂Sb₂O layers with lattice constants a = 4.111, c = 8.072. This compound shows metallic behavior and an anomaly was observed in electrical resistivity and magnetic susceptibility at around 50 K, as seen in the related compound Na₂Ti₂As₂O, where a SDW/CDW transition was reported.