High-energy X-ray diffraction study of CaBaNbO

Yoneda, Yasuhiro   ; Fu, D.*

It has been reported that a ferroelectric having a tungsten bronze structure has an electro-optic effect, a nonlinear effect, and a relaxor-like behavior. BaNbO, which has an orthorhombic structure at room temperature, shows a single-phase tetragonal structure in the composition range of 0.190.32 when Ca is added to the Ba site. I understand. In addition, disorder was generated in the plane due to the substitution effect, and superlattice reflection was observed in the -axis direction despite the ceramic sample. Currently, a local structure model is being constructed based on these phenomena.