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Philosophical Magazine Volume 87, 2007 - Issue 3-5: Tenth International Workshop on Disordered Systems, Molveno-Andalo (Trento), Italy, 18–21 March 2006, Guest Editors: A. Fontana, P. Verrocchio and G. Viliani
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Original Articles

Localized Einstein modes in Ca-based bulk metallic glasses

V. Keppens Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996, USACorrespondence[email protected]
,
Z. Zhang Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996, USA
,
O. N. Senkov UES Inc., 4401 Dayton-Xenia Rd., Dayton, OH 45432, USA
&
D. B. Miracle Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright–Patterson AFB, OH 45433, USA
Pages 503-508 | Received 14 May 2006, Accepted 12 Jun 2006, Published online: 05 Apr 2011
 
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Abstract

Low-temperature specific heat and elastic moduli measurements are reported for Ca-based bulk metallic glasses. The deviation from the Debye behaviour observed in the specific heat is modelled with a simple Einstein oscillator with characteristic temperature θ E = 80 K. The presence of this local mode can also account for the deviation from normal ‘Varshni behaviour’ observed in the temperature dependence of the elastic moduli.

Acknowledgements

This work is supported by the National Science Foundation, Grant No. DMR-0506292.

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