Aging in K1−xLixTaO3 : A Domain Growth Interpretation

作者：F. Alberici-Kious, Jean‐Philippe Bouchaud, Leticia F. Cugliandolo, Pierre Doussineau, Alain Levelut · 发表于：Physical Review Letters · 年份：1998 · DOI：10.1103/physrevlett.81.4987 · 被引用次数：66 · 研究领域：Electronic and Structural Properties of Oxides、Photorefractive and Nonlinear Optics、Ferroelectric and Piezoelectric Materials

The aging behavior of the ac susceptibility of randomly substituted ${\mathrm{K}}_{1\ensuremath{-}x}{\mathrm{Li}}_{x}{\mathrm{TaO}}_{3}$ 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.