I. Physikalisches Institut, Universität Göttingen, D-37077 Göttingen, Germany.
Phys Rev Lett. 2012 Aug 31;109(9):095508. doi: 10.1103/PhysRevLett.109.095508.
In multicomponent metallic glasses, we demonstrate that diffusion and secondary (β) relaxation are closely related. The diffusion motion of the smallest constituting atoms takes place within the temperature and time regimes where the β relaxations are activated, and, in particular, the two processes have similar activation energies. We suggest cooperative stringlike atomic motion plays an important role in both processes. This finding provides additional insights into the structural origin of the β relaxations as well as the mechanisms of diffusions in metallic glasses.
在多组分金属玻璃中，我们证明扩散和二级（β）弛豫密切相关。最小组成原子的扩散运动发生在β弛豫被激活的温度和时间范围内，特别是这两个过程具有相似的激活能。我们认为协同的串状原子运动在这两个过程中都起着重要作用。这一发现为β弛豫的结构起源以及金属玻璃中扩散的机制提供了更多的见解。
