Lunkenheimer P, Wehn R, Schneider U, Loidl A
Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, D-86135 Augsburg, Germany.
Phys Rev Lett. 2005 Jul 29;95(5):055702. doi: 10.1103/PhysRevLett.95.055702. Epub 2005 Jul 27.
We present time-dependent dielectric loss data for various glass formers below the glass temperature. The observed aging dynamics is described using a modified Kohlrausch-Williams-Watts law taking into account the variation of the relaxation time during aging. It leads to values for the aging relaxation time and stretching exponent, fully consistent with the results from equilibrium measurements performed at higher temperatures. Irrespective of the dynamic process prevailing in the investigated frequency region, the aging dynamics is always determined by the structural relaxation process.
我们给出了低于玻璃化温度的各种玻璃形成体的时间相关介电损耗数据。利用修正的科尔劳施-威廉姆斯-瓦特定律描述了观察到的老化动力学，该定律考虑了老化过程中弛豫时间的变化。这得出了老化弛豫时间和伸展指数的值，与在较高温度下进行的平衡测量结果完全一致。无论在所研究的频率区域中占主导地位的动态过程如何，老化动力学总是由结构弛豫过程决定的。
