The inset of Fig. 6 shows the real M0(ν) and imaginary M00(ν) components of electric modulus as a function of frequency at a xed temperature of 423 K for the CCTO/Zr and CCTO/T samples. By the placing of the maximum M00 on the frequency spectrum the relaxation times can be easier determined. For all samples, the increase in temperature shifts the M00(ν) maximum towards higher frequencies even beyond the range of the spectrum (above 106 Hz). For the CCTO/Zr and CCTO/T samples, below the temperature of 350 K the