https://doi.org/10.1007/s100510170175
Frequency dependence of aging, rejuvenation and memory in a disordered ferroelectric
1
Service de Physique de l'État Condensé, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France
2
Laboratoire des Milieux Désordonnés et Hétérogènes (Associated with the Centre National de la Recherche
Scientifique (UMR 7603)) ,
Université Pierre et Marie Curie,
Case 86, 75252 Paris Cedex 05, France
3
Departamento de Fisica, Universidade do Minho, 4709 Braga, Portugal
Corresponding author: a bouchau@spec.saclay.cea.fr
Received:
10
November
2000
Revised:
20
February
2001
Published online: 15 June 2001
We characterize in details the aging properties of
the ferroelectric phase of KTa
Nbx O3 (ktn), where
both rejuvenation and (partial) memory are observed. In particular, we
carefully examine the frequency dependence of several quantities that
characterize aging, rejuvenation and memory. We find a marked subaging
behaviour, with an a.c. dielectric susceptiblity scaling as 
,
where 
is the waiting time. We suggest an interpretation in
terms of pinned domain walls, much along the lines
proposed for aging in a disordered ferromagnet, where both domain wall
reconformations and overall (cumulative) domain growth are needed to
rationalize the experimental findings.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 77.22.Gm – Dielectric loss and relaxation / 78.30.Ly – Disordered solids
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
