fig4

Figure 4. (A-D) Dielectric constant and loss tangent as a function of temperature for PLSBZST thick-film ceramics at 1, 5, 10, and 50 kHz; (E) ln(1/ε_r-1/ε_m) as a function of ln(T-T_m) at 10 kHz. (F) Inverse dielectric constant (1000/ε_r) as a function of temperature at 10 kHz; the inset shows T_m, T_B, and T_B-T_m as a function of the Sr²⁺ content. Moreover, the red stars denote T_m, while the blue stars denote T_B. PLSBZST: (Pb_0.92-xLa_0.04Sr_xBa_0.02)(Zr_0.64Sn_0.35Ti_0.01)O₃.