The effects of elevated temperature on the long and short term ferroelectric properties of La0.5Sr0.5Co3(LSCO)/PbZr0.53Ti0.47O3(PZT)/La0.5Co3(LSCO) heterostructure capacitors are presented in this paper. Capacitors are evaluated in the temperature range of 25°C to 100°C. Polarization values (switched and non-switched), coercive voltages, and PZT resistivity are measured as a function of temperature. Rate of fatigue, tendency to imprint, and retention loss are also investigated in the 25–100°C temperature range. An activation energy for the process responsible for loss of remanent polarization is determined from the fatigue data.