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Frequency Dependence of Aging, Rejuvenation and Memory in a disordered ferroelectric | | J.P. Bouchaud
; P. Doussineau
; T. de Lacerda-Arôso
; A. Levelut
; | | Date: |
10 Nov 2000 | | Subject: | cond-mat | | Affiliation: | CEA-Saclay), P. Doussineau (Jussieu), T. de Lacerda-Arôso (Braga) and A. Levelut (Jussieu | | Abstract: | We characterize in details the aging properties of the ferroelectric phase of K Ta_{1-x} Nb_x O_3 (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 $omega sqrt{t_w}$, where $t_w$ 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. | | Source: | arXiv, cond-mat/0011190 | | Services: | Forum | Review | PDF | Favorites | |
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