Correlation between beta Relaxation and Self-Diffusion of the Smallest Constituting Atoms in Metallic Glasses

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Publication Details

Output type: Journal article

Author list: Yu HB, Samwer K, Wu Y, Wang WH

Publisher: Springer

Publication year: 2012

Journal: Applied Physics A: Materials Science and Processing (0947-8396)

Volume number: 109

Issue number: 9

ISSN: 0947-8396

eISSN: 1432-0630

Languages: English-Great Britain (EN-GB)

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Open access status: green

Full text URL: https://cdr.lib.unc.edu/downloads/9c67ww596

Abstract

In multicomponent metallic glasses, we demonstrate that diffusion and secondary (beta) relaxation are closely related. The diffusion motion of the smallest constituting atoms takes place within the temperature and time regimes where the beta 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 beta relaxations as well as the mechanisms of diffusions in metallic glasses.

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