Acoustic and thermal vibrational behavior of rare earth glasses
The ultrasonic wave velocity and the thermal expansion of the rare earth glasses have been measured as functions of temperature and pressure to test predictions of the soft potential model for the acoustic and thermal properties. The longitudinal ultrasonic wave velocities increase under pressure. T...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
American Institute of Physics
2006
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| Online Access: | http://psasir.upm.edu.my/id/eprint/57590/ http://psasir.upm.edu.my/id/eprint/57590/1/Acoustic%20and%20thermal%20vibrational%20behavior%20of%20rare%20earth%20glasses.pdf |
| _version_ | 1848853409458814976 |
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| author | Hassan, Senin Kancono, Warsito Abd. Aziz, Sidek |
| author_facet | Hassan, Senin Kancono, Warsito Abd. Aziz, Sidek |
| author_sort | Hassan, Senin |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The ultrasonic wave velocity and the thermal expansion of the rare earth glasses have been measured as functions of temperature and pressure to test predictions of the soft potential model for the acoustic and thermal properties. The longitudinal ultrasonic wave velocities increase under pressure. The hydrostatic pressure derivative of the bulk modulus is positive: these glasses show a normal elastic response as compressed. However, the pressure derivative of the shear modulus is negative and small, indicating weak softening of shear modes under pressure. The results found are used to determine the Grüneisen parameters. This is to obtain the acoustic mode contribution to thermal expansion. After subtraction of the relaxation and anharmonic contributions, the temperature dependence of the shear wave ultrasound velocity follows a linear law as predicted by the Soft Potential Model. |
| first_indexed | 2025-11-15T10:53:31Z |
| format | Conference or Workshop Item |
| id | upm-57590 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:53:31Z |
| publishDate | 2006 |
| publisher | American Institute of Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-575902017-10-24T06:12:33Z http://psasir.upm.edu.my/id/eprint/57590/ Acoustic and thermal vibrational behavior of rare earth glasses Hassan, Senin Kancono, Warsito Abd. Aziz, Sidek The ultrasonic wave velocity and the thermal expansion of the rare earth glasses have been measured as functions of temperature and pressure to test predictions of the soft potential model for the acoustic and thermal properties. The longitudinal ultrasonic wave velocities increase under pressure. The hydrostatic pressure derivative of the bulk modulus is positive: these glasses show a normal elastic response as compressed. However, the pressure derivative of the shear modulus is negative and small, indicating weak softening of shear modes under pressure. The results found are used to determine the Grüneisen parameters. This is to obtain the acoustic mode contribution to thermal expansion. After subtraction of the relaxation and anharmonic contributions, the temperature dependence of the shear wave ultrasound velocity follows a linear law as predicted by the Soft Potential Model. American Institute of Physics 2006 Conference or Workshop Item PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/57590/1/Acoustic%20and%20thermal%20vibrational%20behavior%20of%20rare%20earth%20glasses.pdf Hassan, Senin and Kancono, Warsito and Abd. Aziz, Sidek (2006) Acoustic and thermal vibrational behavior of rare earth glasses. In: 2nd International Conference on Solid State Science and Technology 2006 (ICSSST 2006), 4-6 Sept. 2006, Kuala Terengganu, Terengganu. (pp. 147-152). 10.1063/1.2739842 |
| spellingShingle | Hassan, Senin Kancono, Warsito Abd. Aziz, Sidek Acoustic and thermal vibrational behavior of rare earth glasses |
| title | Acoustic and thermal vibrational behavior of rare earth glasses |
| title_full | Acoustic and thermal vibrational behavior of rare earth glasses |
| title_fullStr | Acoustic and thermal vibrational behavior of rare earth glasses |
| title_full_unstemmed | Acoustic and thermal vibrational behavior of rare earth glasses |
| title_short | Acoustic and thermal vibrational behavior of rare earth glasses |
| title_sort | acoustic and thermal vibrational behavior of rare earth glasses |
| url | http://psasir.upm.edu.my/id/eprint/57590/ http://psasir.upm.edu.my/id/eprint/57590/ http://psasir.upm.edu.my/id/eprint/57590/1/Acoustic%20and%20thermal%20vibrational%20behavior%20of%20rare%20earth%20glasses.pdf |