Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates
Hassan, Senin and Abd. Aziz, Sidek and G. A., Saunders and G., Carini (1995) Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates. Pertanika Journal of Science & Technology, 3 (2). pp. 261-269. ISSN 0128-7680
Measurements of specific heat in the temperature range 1.5K to 30K were made for two samples of vitreous samarium phosphates. A large contribution to the specific heat, well above what is expected from acoustic phonons (in the Debye approximation), is discussed in terms of the theoretical predictions of a phonon-fracton cross-over approach. The phonon-fracton density of states used to fit the excess specific heat gives rise to model parameters with the same magnitudes as those found previously for a wide range of glasses.
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