Vibrational dynamics of some amorphous and quasicrystalline alloys

Gupta, Ajay ; Shah, P. ; Lalla, N. P. ; Dasannacharya, B. A. ; Harami, T. ; Yoda, Y. ; Seto, M. ; Yabashi, Makina ; Kikuta, Seishi (2001) Vibrational dynamics of some amorphous and quasicrystalline alloys Materials Science and Engineering: A - Structural Materials - Properties, Microstructure and Processing, 304-306 . pp. 731-734. ISSN 0921-5093

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Inelastic nuclear resonance scattering has been used to get partial vibrational density of states (PVDOS) of iron in two classes of systems: (i) quasicrystalline Al63.5Cu24Fe12.5, its rhombohedral approximant and Al70Cu20Fe10 crystalline (tetragonal) phase and (ii) amorphous Fe80B20 and its crystalline counterpart. PVDOS in quasicrystalline phase consists of a rather broad maximum at 28 meV with a small hump at 21 meV, and is somewhat similar to that in crystalline Al70Cu20Fe10. Results suggest some similarity in the iron environment in quasicrystalline, approximant and crystalline phases. Amorphous Fe80B20 exhibits an excess density of states as compared to the crystalline phase in the energy range 4-21 meV, which may be attributed to the boson peak.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Partial Vibrational Density of Iron; Amorphous and Quasicrystalline Alloys; Phonons
ID Code:10196
Deposited On:03 Nov 2010 04:35
Last Modified:28 May 2011 05:33

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