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To clarify the mechanism of the entropic shrinkage of a metaphosphate LiNaKCsPO3 glass, high‐resolution inelastic X‐ray scattering is carried out in the momentum transfer (Q) range from 1.6 to 15.9 nm−1 by changing the stretched sample rod directions perpendicular and parallel to the X‐ray scattering plane. Phonon excitations are found only in a low Q range below about 3 nm−1, and the so‐called Boson...
Inelastic X‐ray scattering (IXS) measurements are carried out for glassy , , and to investigate atomic dynamics in the glasses. Momentum transfer (Q) dependence of the acoustic excitation energy in each glass follows the ultrasonic sound speed. No positive dispersion is observed in these glasses although liquid near the melting point shows it. The stoichiometric...
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