Aging in K${}_{1-x}$Li${}_x$Ta0${}_3$: a domain growth interpretation

Abstract

The aging behaviour of the a.c. susceptibility of randomly substituted K${}_{1-x}$Li${}_x$Ta0${}_3$ 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.

4 pages. Preprint LPTENS/9820, submitted to Phys. Rev. Lett

References in corpus (1)

• Memory and Chaos Effects in Spin Glasses

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