Journal of Pure and Applied Ultrasonics

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Ultrasonic Attenuation in Yttrium Monochalcogenides


Affiliations
1 USICT, Guru Gobind Singh Indraprastha University, Sector 16C, Dwarka , New Delhi-110078, India
2 Amity Institute of Applied Sciences, Amity University, Noida-201313, India
3 State Council of Educational Research & Training Haryana, Gurugram-122 001, India
4 Amity School of Engineering and Technology, Delhi, Noida-201313, India
5 Amity Institute of Nanotechnology, Amity University, Noida-201313, India
6 Department of Physics, P.P.N. (P.G.) College, Kanpur-208001, India
 

The present paper reports ultrasonic properties of yttrium chalcogenides (YCh: Ch=S, Se and Te) along <110> direction in the temperature region 100-500 K. The Coulomb and Bom-Mayer potential model is applied to compute the higher order elastic constants. These elastic constants are used to utilise for computing ultrasonic velocity, ultrasonic Grüneisen parameters, thermal conductivity and ultrasonic attenuation. Additionally, the second order elastic constants has been applied to evaluate many mechanical properties such as Young modulus, bulk modulus, Cauchy's relation, Zener's anisotropy factor, toughness to fracture ratio for the prediction about the chosen materials. The YCh follow the Born stability criterion, so these materials are mechanical stable. The toughness to fracture is greater than 0.57, so these materials are brittle in nature. The thermal conductivity is also computed by means of Slack and Berman approach. Finally the temperature ultrasonic attenuation due to phonon-phonon interaction and thermo-elastic relaxation mechanisms has been computed along <110> at room temperature. The achieved results for yttrium monochalcogenides are discussed with similar type of materials.


Keywords

Monochalcogenides, Elastic Constants, Ultrasonic Properties, Thermal Properties.
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  • Ultrasonic Attenuation in Yttrium Monochalcogenides

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Authors

Bhawan Jyoti
USICT, Guru Gobind Singh Indraprastha University, Sector 16C, Dwarka , New Delhi-110078, India
Devraj Singh
Amity Institute of Applied Sciences, Amity University, Noida-201313, India
Shivani Kaushik
State Council of Educational Research & Training Haryana, Gurugram-122 001, India
Vyoma Bhalla
Amity School of Engineering and Technology, Delhi, Noida-201313, India
Shikha Wadhwa
Amity Institute of Nanotechnology, Amity University, Noida-201313, India
D. K. Pandey
Department of Physics, P.P.N. (P.G.) College, Kanpur-208001, India

Abstract


The present paper reports ultrasonic properties of yttrium chalcogenides (YCh: Ch=S, Se and Te) along <110> direction in the temperature region 100-500 K. The Coulomb and Bom-Mayer potential model is applied to compute the higher order elastic constants. These elastic constants are used to utilise for computing ultrasonic velocity, ultrasonic Grüneisen parameters, thermal conductivity and ultrasonic attenuation. Additionally, the second order elastic constants has been applied to evaluate many mechanical properties such as Young modulus, bulk modulus, Cauchy's relation, Zener's anisotropy factor, toughness to fracture ratio for the prediction about the chosen materials. The YCh follow the Born stability criterion, so these materials are mechanical stable. The toughness to fracture is greater than 0.57, so these materials are brittle in nature. The thermal conductivity is also computed by means of Slack and Berman approach. Finally the temperature ultrasonic attenuation due to phonon-phonon interaction and thermo-elastic relaxation mechanisms has been computed along <110> at room temperature. The achieved results for yttrium monochalcogenides are discussed with similar type of materials.


Keywords


Monochalcogenides, Elastic Constants, Ultrasonic Properties, Thermal Properties.

References