Figure 4

(a) Atomic pair-distribution functions of undoped, Bi-doped, and Bi/Mn-doubly doped BaTiO3 derived from high-energy X-ray diffraction data. (b) Expanded view of Fig. 4a around the peaks related to Ti-O bonds. Calculation results for undoped BaTiO3 based on a tetragonal structure model and BaTiO3:Mn:Bi(0.4%) based on a rhombohedral structure model are also represented using thin lines in Fig. 4b.