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Report No.

High-energy X-ray diffraction study of Ca$$_x$$Ba$$_{1-x}$$Nb$$_2$$O$$_6$$

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. BaNb$$_2$$O$$_6$$, which has an orthorhombic structure at room temperature, shows a single-phase tetragonal structure in the composition range of 0.19$$le x le$$0.32 when Ca is added to the Ba site. I understand. In addition, disorder was generated in the ${it a-b}$ plane due to the substitution effect, and superlattice reflection was observed in the ${it c}$-axis direction despite the ceramic sample. Currently, a local structure model is being constructed based on these phenomena.



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