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Elastic and Acoustic Properties of Hexagonal MnB2, TcB2 and ReB2 Compounds

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The paper presents a comprehensive computation of second- and third-order elastic constants using Lennard-Jones potential and then velocities and attenuation of acoustics waves along unique direction in hexagonal structured MnB2, TcB2 and ReB2 compounds. The comparison of these computed results has been made with available theoretical and experiment results. The orientation dependent acoustic velocity has been also evaluated to study the anisotropic behaviour of these compounds. The inconsistent behaviour of angle-dependent velocities is associated to the action of second order elastic constants. The average sound velocity is a direct consequence of Debye temperature, specific heat and thermal energy density of these compounds. The mechanical properties of MnB2 are better than those of ReB2, because MnB2 has high ultrasonic velocities and low attenuation. Obtained results, together with other well known physical properties, may expand future prospects for the applications and study of these materials.
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Keywords: ELASTIC CONSTANTS; LONGITUDINAL WAVES; SURFACE WAVES; ULTRASONIC VELOCITY

Document Type: Research Article

Publication date: June 1, 2013

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  • Journal of Advanced Physics is an interdisciplinary peer-reviewed journal consolidating research activities in all experimental and theoretical aspects of advanced physics. The journal aims in publishing articles of novel and frontier physics that merit the attention and interest of the whole physics community. JAP publishes review articles, full research articles, short communications of important new scientific and technological findings in all latest research aspects of physics.
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