Local structure analysis of BiNaTiOBaTiO solid solutions

Yoneda, Yasuhiro   ; Kobayashi, Toru ; Tsuji, Takuya  ; Matsumura, Daiju   ; Saito, Yuji  ; Noguchi, Yuji*

BiNaTiOBaTiO (BNTBT) solid solutions have been extensively studied because they exhibit good piezoelectric properties. In addition, a wide variety of phases are observed depending on the BT composition. Soft X-ray absorption spectroscopy and high-energy X-ray diffraction experiments of BNTBT solid solutions were performed using synchrotron radiation. From the electronic structure and local structure of BNTBT solid solution, the substitution effect of BT occurred mainly at the A site, which is the substitution site of Ba. The rhombohedral strain of the TiO octahedron did not change with the change in BT composition, suggesting that the change in the electronic structure at the O- absorption edge is due to the change in the hybridization state.