An analysis of lattice vibrations of ordered Fe3Al |
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| Affiliation: | 1. National Research University Higher School of Economics, Moscow; Moscow State Institute of International Relations (MGIMO University);2. National Research University Higher School of Economics, Research Fellow, Moscow; Сenter for Macroeconomic Analysis and Short-term Forecasting (CMASF), Senior Expert, Moscow |
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| Abstract: | The frequencies of the normal modes of vibration of ordered Fe3Al are classified according to the irreducible representations of the groups of the wave vector for points and lines of special symmetry.A simple model, with interactions extending up to the second neighbours is used to evaluate the coefficients of the dynamical matrix. The coefficients are given in terms of nine force constants. |
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