Aging in K1-xLixTa03: a domain growth interpretation
F. Alberici-Kious, J. -P. Bouchaud, L. F Cugliandolo, P. Doussineau, A. Levelut
Abstract
The aging behaviour of the a.c. susceptibility of randomly substituted K1-xLixTa03 crystals reveals marked differences with spin-glasses in that cooling rate effects are very important. The response to temperature steps (including temperature cycles) was carefully studied. A model based on thermally activated domain growth accounts for all the experimental results, provided one allows for a large distribution of pinning energies, in such a way that `slow' and `fast' domains coexist. Interesting similarities with deeply supercooled liquids are underlined.
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