Journal of Pure and Applied Ultrasonics

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Temperature Dependence of Anharmonic Properties of Lithium Halides


Affiliations
1 Department of Physics, Brahmanand Post-Graduate College, Rath, Hamirpur-210431, U.P., India
 

If the values of second order elastic constants and density at a particular temperature are known for any substance, one may obtain ultrasonic velocities for longitudinal and shear waves which give an important information about its anharmonic properties. For computing the second and third order elastic constants (SOECs & TOECs) at any temperature, a method have been developed, starting from nearest neighbour distance and hardness parameter assuming Coulomb and Born Mayer potentials for face centered cubic crystals. The anharmonic properties of lithium halides are evaluated at different temperatures (100 K to upto their melting points) using this formulation. The results obtained in present investigation are in reasonable agreement with other studies.
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  • Temperature Dependence of Anharmonic Properties of Lithium Halides

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Authors

Kailash
Department of Physics, Brahmanand Post-Graduate College, Rath, Hamirpur-210431, U.P., India
K. M. Raju
Department of Physics, Brahmanand Post-Graduate College, Rath, Hamirpur-210431, U.P., India
Khare
Department of Physics, Brahmanand Post-Graduate College, Rath, Hamirpur-210431, U.P., India

Abstract


If the values of second order elastic constants and density at a particular temperature are known for any substance, one may obtain ultrasonic velocities for longitudinal and shear waves which give an important information about its anharmonic properties. For computing the second and third order elastic constants (SOECs & TOECs) at any temperature, a method have been developed, starting from nearest neighbour distance and hardness parameter assuming Coulomb and Born Mayer potentials for face centered cubic crystals. The anharmonic properties of lithium halides are evaluated at different temperatures (100 K to upto their melting points) using this formulation. The results obtained in present investigation are in reasonable agreement with other studies.