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Report No.

Local structure analysis of Bi$$_{0.5}$$Na$$_{0.5}$$TiO$$_3$$

Yoneda, Yasuhiro; Nagata, Hajime*; Takenaka, Tadashi*

The potential lead-free piezoelectric material bismuth sodium titanate, Bi$$_{0.5}$$Na$$_{0.5}$$TiO$$_3$$ (BNT), was investigated by means of high-energy synchrotron X-ray diffraction. BNT has been assumed thus far to exhibit the rhombohedral space group $$R3c$$ at room temperature. Recently, the average structure of BNT was described by the monoclinic space group $$Cc$$. We performed local structure analysis of BNT using atomic pair-distribution function method. The ground state of BNT was found to be rhombohedral structure in which bismuth and sodium atoms were chemically ordered in the perovskite ${it A}$-site.



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Category:Physics, Multidisciplinary



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