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Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates

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 predict...

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Main Authors: Hassan, Senin, Abd. Aziz, Sidek, G. A., Saunders, G., Carini
Format: Article
Language:English
English
Published: Universiti Putra Malaysia Press 1995
Online Access:http://psasir.upm.edu.my/id/eprint/3855/1/Specific-heat_Study_of_Low-energy_Vibrational_State_m.pdf
http://psasir.upm.edu.my/id/eprint/3855/
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spelling my.upm.eprints.38552013-05-27T07:11:47Z http://psasir.upm.edu.my/id/eprint/3855/ Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates Hassan, Senin Abd. Aziz, Sidek G. A., Saunders G., Carini 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. Universiti Putra Malaysia Press 1995 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/3855/1/Specific-heat_Study_of_Low-energy_Vibrational_State_m.pdf 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 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description 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.
format Article
author Hassan, Senin
Abd. Aziz, Sidek
G. A., Saunders
G., Carini
spellingShingle Hassan, Senin
Abd. Aziz, Sidek
G. A., Saunders
G., Carini
Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates
author_facet Hassan, Senin
Abd. Aziz, Sidek
G. A., Saunders
G., Carini
author_sort Hassan, Senin
title Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates
title_short Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates
title_full Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates
title_fullStr Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates
title_full_unstemmed Specific-heat Study of Low-energy Vibrational State m Vitreous Samarium Phosphates
title_sort specific-heat study of low-energy vibrational state m vitreous samarium phosphates
publisher Universiti Putra Malaysia Press
publishDate 1995
url http://psasir.upm.edu.my/id/eprint/3855/1/Specific-heat_Study_of_Low-energy_Vibrational_State_m.pdf
http://psasir.upm.edu.my/id/eprint/3855/
_version_ 1643822733598916608
score 13.160551

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