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.
@article{arxiv.cond-mat/9805208,
title = {Aging in K$_{1-x}$Li$_x$Ta0$_3$: a domain growth interpretation},
author = {F. Alberici-Kious and J. -P. Bouchaud and L. F Cugliandolo and P. Doussineau and A. Levelut},
journal= {arXiv preprint arXiv:cond-mat/9805208},
year = {2009}
}
Comments
4 pages. Preprint LPTENS/9820, submitted to Phys. Rev. Lett