Total dose radiation effects of Au/PbZr0.52Ti0.48O3/YBa2Cu3O7-delta/LaAlO3ferroelectric capacitors

PbZr0.52Ti0.48O3/YBa2Cu3O7-delta (PZT/YBCO) thin films have been fabricated on LaAlO3 substrate by the pulsed laser excimer deposition method. In orde r to investigate total dose radiation effects by Co-60 gamma-irradiation on the Au/PZT/YBCO ferroelectric capacitor, the capacitance-voltage (C-V) and the retained polarization properties of the capacitor were measured before and after gamma-ray irradiation. The results showed that, with the increme nt of the total dose, the retained polarization (Delta P) and the dielectri c constant (epsilon) decreased, but the absolute value of the negative and positive coercitive fields increased. It is due to the effect of charges tr apped by defects in the PZT capacitor during irradiation.