Ultrasonic Attenuation in Lanthanum Monochalcogenides : Cross-Disciplinary Physics

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概要

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• Ultrasonic attenuation due to phonon-phonon interaction and thermoelastic relaxation are studied in Lanthanum Monochalcogenides in (110) direction at different higher temperatures. For evaluation of ultrasonic absorption coefficients the second and third order elastic constants (SOEC) and (TOEC) are also calculated. Shear wave attenuation shows maximum along <110> propagation direction with polarized along <110> and the attenuation increases at higher temperatures. Thermo-elastic loss is very small compared to phonon-viscosity loss. Behavior of temperature dependence of the absorption is the same as in case of pure metals and dielectric crystals.

• 社団法人日本物理学会の論文
• 2001-06-15

著者

• Yadav Raja

  Physics Department University Of Allahabad

• SINGH Devraj

  Physics Department, University of Allahabad

• Singh Devraj

  Physics Department University Of Allahabad

関連論文

• Ultrasonic Attenuation in Lanthanum Monochalcogenides : Cross-Disciplinary Physics

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