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Dynamical and quasistatic structural relaxation paths in Pd_(40)Ni_(40)P_(20) glass

Kahl, A. and Koeppe, T. and Bedorf, D. and Richert, R. and Lind, M. L. and Demetriou, M. D. and Johnson, W. L. and Arnold, W. and Samwer, K. (2009) Dynamical and quasistatic structural relaxation paths in Pd_(40)Ni_(40)P_(20) glass. Applied Physics Letters, 95 (20). Art. No. 201903. ISSN 0003-6951.

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By sequential heat treatment of a Pd_(40)Ni_(40)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.

Item Type:Article
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Additional Information:© 2009 American Institute of Physics. Received 28 August 2009; accepted 29 October 2009; published online 19 November 2009. 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.
Funding AgencyGrant Number
NSFSa 337/10-1
Subject Keywords:glass structure; glass transition; heat treatment; metallic glasses; nickel alloys; palladium alloys; phosphorus alloys; potential energy functions; ultrasonic effects
Issue or Number:20
Classification Code:PACS: 61.43.Fs;; 62.65.+k; 81.40.Gh.
Record Number:CaltechAUTHORS:20091208-090858625
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Official Citation:Dynamical and quasistatic structural relaxation paths in Pd[sub 40]Ni[sub 40]P[sub 20] glass A. Kahl, T. Koeppe, D. Bedorf, R. Richert, M. L. Lind, M. D. Demetriou, W. L. Johnson, W. Arnold, and K. Samwer, Appl. Phys. Lett. 95, 201903 (2009), DOI:10.1063/1.3266828
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16896
Deposited By: Tony Diaz
Deposited On:04 Jan 2010 23:45
Last Modified:03 Oct 2019 01:19

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