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Lattice Dynamics of the Force Constant Defect System Pd 0.95 Ru 0.05
Author(s) -
Maliszewski E.,
Sosnowski J.,
Bednarski S.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221630110
Subject(s) - force constant , inelastic neutron scattering , phonon , condensed matter physics , lattice constant , dispersion relation , inelastic scattering , lattice (music) , physics , neutron scattering , constant (computer programming) , scattering , atomic physics , quantum mechanics , diffraction , molecule , computer science , acoustics , programming language
The lattice dynamics of a Pd 0.95 Ru 0.05 single crystal is investigated at room temperature. The phonon dispersion relations along the directions [100], [110], and [111] are measured using the inelastic neutron scattering technique. The seven‐neighbour Born‐von‐Kármán model is fitted to the experimental branches and the force constants and elastic constants are calculated. The phonon frequency shifts, Δω( q ), and the self‐energy functions, Σ j ( q , ω j ( q )), are determined. From the comparison of the self‐energy functions for 5 and 10 at% Ru contents in Pd matrix the evolution of the self‐energy with the Ru concentration is clearly seen.