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Elastic, Mechanical, Thermal and Ultrasonic Studies of Lanthanum Selenide at Elevated Temperature

Jitendra Kumar, S.P. Singh, Chandan Gupta and Kailash


The elastic, thermal and ultrasonic properties of Lanthanum Selenide (LaSe) have been computed in the temperature range 300-1000 K at an interval of 50 K. The Second order elastic constants (SOECs) are computed using Coulomb and Born-Mayer potentials. SOECs are being used to evaluate various mechanical and thermal parameters, which provide the valuable information about the future performance of the crystal. Mechanical properties such as Young’s Modulus, Bulk modulus, Shear modulus, Zener anisotropy factor, Poisson’s ratio and Toughness to Fracture ratio have also been computed. Ultrasonic wave propagation velocity and attenuation of LaSe have also been computed along <100>, <110> and <111> directions. The results discussed and correlated with mechanical and thermo-physical properties. The data of Lanthanum Selenide crystal obtained through different techniques give important and valuable information about internal structure and inherent properties of the crystal.

Keywords: Nearest neighbor distance, Hardness parameter, Ductile, Brittle, Anisotropic.

Posted in Volume 5, Issue No. 3 (July-September 2023)

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