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

doi:10.1063/1.3266828

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

Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

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 language	English (US)
Article number	201903
Journal	Applied Physics Letters
Volume	95
Issue number	20
DOIs	https://doi.org/10.1063/1.3266828
State	Published - 2009

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3266828

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title = "Dynamical and quasistatic structural relaxation paths in Pd40 Ni40 P20 glass",

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.",

author = "A. Kahl and T. Koeppe and D. Bedorf and Ranko Richert and Marylaura Thomas and Demetriou, {M. D.} and Johnson, {W. L.} and W. Arnold and K. Samwer",

note = "Funding Information: Financial support is acknowledged by the DFG-SFB 602 and Sa 337/10-1 Leibniz-Program as well as the MRSEC Program of the National Science Foundation under Award No. DMR-0520565.",

year = "2009",

doi = "10.1063/1.3266828",

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volume = "95",

journal = "Applied Physics Letters",

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T1 - Dynamical and quasistatic structural relaxation paths in Pd40 Ni40 P20 glass

AU - Kahl, A.

AU - Koeppe, T.

AU - Bedorf, D.

AU - Richert, Ranko

AU - Thomas, Marylaura

AU - Demetriou, M. D.

AU - Johnson, W. L.

AU - Arnold, W.

AU - Samwer, K.

N1 - Funding Information: Financial support is acknowledged by the DFG-SFB 602 and Sa 337/10-1 Leibniz-Program as well as the MRSEC Program of the National Science Foundation under Award No. DMR-0520565.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

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Dynamical and quasistatic structural relaxation paths in Pd₄₀ Ni₄₀ P₂₀ glass

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