Figure 8
Modified Curie law fitting curves: (a) Variation of ln (\(\frac{1}{{\varepsilon }^{l}}-\frac{1}{{\varepsilon }_{max}^{l}}\)) vs. ln (T–Tm) @ 1 MHz frequency of RE-substituted BaBi4−xRExTi4O15 (x = 0.10, RE = La, Pr, Nd, and Sm) ceramics, (b) A clear distinct ferroelectric phase transitions (Tm) of BBTO and substituted BBTO ceramics @ 1 MHz frequency point. (c) The plots represent variation of Tm and \({\varepsilon }_{max}^{1}\) with increasing ionic radii of substituted RE-element.
