Dynamical and quasistatic structural relaxation paths in Pd40 Ni40 P20 glass

A. Kahl, T. Koeppe, D. Bedorf, Ranko Richert, Marylaura Thomas, M. D. Demetriou, W. L. Johnson, W. Arnold, K. Samwer

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Abstract

By sequential heat treatment of a Pd40 Ni40 P 20 metallic glass at temperatures and durations for which α -relaxation is not possible, dynamic, and quasistatic relaxation paths below the glass transition are identified via ex situ ultrasonic measurements following each heat treatment. The dynamic relaxation paths are associated with hopping between nonequilibrium potential energy states of the glass, while the quasistatic relaxation path is associated with reversible Β -relaxation events toward quasiequilibrium states. These quasiequilibrium states are identified with secondary potential energy minima that exist within the inherent energy minimum of the glass, thereby supporting the concept of the sub-basin/metabasin organization of the potential-energy landscape.

Original languageEnglish (US)
Article number201903
JournalApplied Physics Letters
Volume95
Issue number20
DOIs
StatePublished - Nov 30 2009

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Kahl, A., Koeppe, T., Bedorf, D., Richert, R., Thomas, M., Demetriou, M. D., Johnson, W. L., Arnold, W., & Samwer, K. (2009). Dynamical and quasistatic structural relaxation paths in Pd40 Ni40 P20 glass. Applied Physics Letters, 95(20), [201903]. https://doi.org/10.1063/1.3266828