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Tailoring mechanical, thermophysical and ultrasonic properties of dysprosium monochalcogenides |
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| รหัสดีโอไอ | |
| Creator | 1. Anurag Singh 2. Sudhanshu Tripathi 3. Devraj Singh 4. Bhawan Jyoti |
| Title | Tailoring mechanical, thermophysical and ultrasonic properties of dysprosium monochalcogenides |
| Publisher | Faculty of Engineering, Khon Kaen University |
| Publication Year | 2567 |
| Journal Title | Engineering and Applied Science Research |
| Journal Vol. | 51 |
| Journal No. | 3 |
| Page no. | 337-346 |
| Keyword | Monochalcogenides, Elastic constants, Thermal conductivity, Ultrasonic attenuation |
| URL Website | https://ph01.tci-thaijo.org/index.php/easr/index |
| Website title | Engineering and Applied Science Research |
| ISSN | 2539-6161 |
| Abstract | The ultrasonic characteristics of dysprosium monochalcogenides, DyX (X = S, Se and Te) as a function of temperature and crystallographic direction, are studied in present investigation. First, the second- and third-order elastic constants (SOECs and TOECs) have been computed using Coulomb and Born-Mayer potential from 0K to 500K. The mechanical properties have been evaluated with the achieved values of SOECs for finding the intrinsic properties, stability and futuristic performance of DyX. The mechanical stability and elastic moduli follow the order DyS > DySe > DyTe. Supplemental the acoustic velocities including Debye average velocity, thermal relaxation time, Debye temperature and nonlinear parameter have been computed along <100>, <110> and <111> directions in the temperature range 100K to 500K. The Debye average velocity is found to be highest for wave propagating along <110> and polarized along "<1" "1" ̅"0>." Finally, the ultrasonic attenuation using the modified Mason’s approach has been computed in the temperature regime 100-500K along different crystallographic directions and calculated results predict that Akheiser damping dominates over the thermal attenuation. The obtained results have been analyzed and discussed with the available literature. |
