Fig. 4.

TEM images of the (La_1 − xPr_x)_0.67Ca_0.33MnO₃ nanoparticles post-annealed at 800 °C with different Pr-doping concentrations. a x = 0.0, b x = 0.1, c x = 0.2, d x = 0.3, e x = 0.4, and f x = 0.5. Insets in (a–f) are the corresponding SAED patterns of the (La_1 − xPr_x)_0.67Ca_0.33MnO₃ nanoparticles, respectively. The indices are labeled based on the pseudo-cubic perovskite structure. g–h HRTEM images of the (La_1 − xPr_x)_0.67Ca_0.33MnO₃ nanoparticles with Pr-doping concentration x = 0.1 and x = 0.3. Insets are the FFT patterns of the HRTEM images