Dispersion of acoustic-like and optic-like vibrational excitations in Ni{sub 2}B metallic glass
- State Technical University for Nuclear Power Engineering (Russian Federation)
- Russian Research Centre 'Kurchatov Institute' (Russian Federation)
- Institut Laue-Langevin (France)
- University of New South Wales (Australia)
The dynamic structure factor S(Q, E) of Ni{sub 2}B metallic glass was studied by inelastic neutron scattering in the ranges of momentum transfers 0.7 < {Dirac_h}Q/A{sup -1} < 7, and energy, 2 < E/meV < 70, transfers. The measurements were performed with the IN4 spectrometer (Institut Laue-Langevin (ILL), Grenoble, France) on three samples of the same chemical composition but with different contents of Ni and B isotopes, as a result of which partial contributions were determined. The cuts through S(Q, E) for different values of E and Q demonstrated a characteristic behavior indicating that vibrational excitations, similar to acoustic and optical phonon excitations in crystals, propagate in an amorphous medium in a certain energy and momentum range.
- OSTI ID:
- 21090912
- Journal Information:
- Crystallography Reports, Vol. 52, Issue 3; Other Information: DOI: 10.1134/S1063774507030236; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
- Country of Publication:
- United States
- Language:
- English
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