Relaxation processes play a crucial role in glassy materials. However, current dielectric or mechanical spectroscopy typically reaches a lower limit of around 10−1 or 10−2 Hz, which restricts the exploration of long-time dynamics and stability. Here, we propose a mechanical protocol that enables the probing of relaxation processes down to 10−5 Hz, extending the lower limit by ∼3–4 orders of magnitude. The effectiveness of this method is demonstrated in investigating metallic glasses, where the primary and secondary relaxations are detected over an extended timescale. An additional relaxation process has been captured below 10−4 Hz, indicating the emergence of more complex relaxation phenomena over longer timescales. This progress in probing long-term dynamics opens up new possibilities for advancing glassy physics and material properties.

中文翻译：

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探测低至 10-5 Hz 的缓慢玻璃动力学


松弛过程在玻璃材料中起着至关重要的作用。然而，电流介电或机械光谱通常达到 10-1 或 10-2 Hz 左右的下限，这限制了对长期动力学和稳定性的探索。在这里，我们提出了一种机械协议，可以将弛豫过程探测到 10-5 Hz，将下限扩展了 ∼ 3-4 个数量级。这种方法的有效性在研究金属玻璃中得到了证明，其中初级和次级弛豫是在较长时间尺度上检测到的。在 10-4 Hz 以下捕获到额外的弛豫过程，表明在更长的时间尺度上出现了更复杂的弛豫现象。探索长期动力学的这一进展为推进玻璃物理学和材料特性开辟了新的可能性。