  The dynamic dielectric susceptibility and elastic compliance of the relaxor
ferroelectric PLZT 9/65/35 have been measured under different cooling and
heating protocols, in order to study aging and memory. The memory of multiple
aging stages has been found (several dips in the susceptibility curves on
heating), as in spin glass systems below the glass transition. Remarkably, in
PLZT the memory is retained also above the freezing temperature deduced from
the dynamic susceptibilities. The results are discussed in the light of the
existing models of aging and memory in spin and dipolar glasses.
