Figure 8: (a) Plot of the imaginary part, in ohm, of impedance versus its real part, in ohm, for quenched PNO sample, PbNb_{2}O_{6} in orthorhombic phase, at temperatures: 500°C, 550°C, 570°C, 573°C, 600°C, 650°C, and 700°C. Since the complex impedance , quantity () has actually been plotted in the figure. (b) Plot of the imaginary part, in ohm, of impedance versus its real part, in ohm, for the quenched PNO sample, PbNb_{2}O_{6} in orthorhombic phase, at temperatures: 400°C, 440°C, 460°C, and 480°C. Since the complex impedance , quantity () has actually been plotted in the figure.