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Phonons in Ni 31 Dy 69 Glass
Author(s) -
Pratap A.,
Bhandari D.,
Saxe. S.,
Saksena M. P.
Publication year - 1994
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.2221850109
Subject(s) - phonon , transverse plane , amorphous solid , structure factor , long wavelength limit , condensed matter physics , dispersion (optics) , dispersion relation , wavelength , interatomic potential , materials science , physics , limit (mathematics) , optics , quantum mechanics , molecular dynamics , chemistry , mathematics , mathematical analysis , crystallography , structural engineering , engineering
The effective interatomic potential in Ni 31 Dy 69 glass is obtained with the experimental structure factor S( Q ). This potential is compared with those computed using Percus‐Yevick (PY) and hypernetted chain (HNC) approximations. A theory of phonons in amorphous solids is employed to compute the eigenfrequencies of the longitudinal and transverse phonon modes with these diffcrcnt potentials and the results are compared with each other. The elastic and thermodynamic properties of this glass are also studied using the longitudinal and transverse sound velocities estimated from the slope of the long‐wavelength limit of the dispersion relations.