The temperature dependence of the kinetic energy in the amorphous alloy Zr40Be60

The average kinetic energy 〈E(T)〉 of the atomic nucleus for each element of the amorphous alloy Zr40Be60 in the temperature range 10–300K was measured for the first time using VESUVIO spectrometer (ISIS). A comparison of the experimental values of 〈E(T)〉 with the partial ZrBe spectra which were refined by recursion method based on the data obtained with thermal neutron scattering. The satisfactory agreement was reached with the calculations using partial spectra based on thermal neutron spectra obtained with recursion method. Also the experimental data were compared with the Debye model. The measurements at different temperatures (10, 200 and 300K) will provide an opportunity to evaluate the significance of anharmonicity in the dynamics of metallic glasses.