STUDIES ON ELECTRICAL-CONDUCTION IN BI4SRTI4O15

The ferroelectric Bi4SrTi4O15 has been synthesized and a study of the electrical (AC) conductivity was made on both poled and unpoled sample s in the frequency range from 100 Hz to 1 MHz and from room temperatur e to 550 degrees C. In the case of unpoled samples the activation ener gy was found to be 0.54 eV and subsequent to poling it was lowered to 0.39 eV indicating an increased conductivity after poling. Further the conductivity increased with increasing frequency and temperature. DC conductivity measurements were also carried out. Dielectric measuremen ts indicate a peak in the dielectric constant at 530 degrees C.