Temperature-Dependent Elastic and Ultrasonic Properties of Berkelium Monopnictides

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• 作者：Devraj Singh (1)
  Shivani Kaushik (2)
  Sudhanshu Tripathi (3)
  Vyoma Bhalla (1)
  Alok Kumar Gupta (4)
  
• 关键词：Berkelium monopnictides ; Elastic constants ; Ultrasonic velocity ; Grüneisen parameters
• 刊名：Arabian Journal for Science and Engineering
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：39
• 期：1
• 页码：485-494
• 全文大小：742 KB
• 作者单位：Devraj Singh (1)
  Shivani Kaushik (2)
  Sudhanshu Tripathi (3)
  Vyoma Bhalla (1)
  Alok Kumar Gupta (4)
  
  1. Department of Applied Physics, Amity School of Engineering and Technology, New Delhi, 110061, India
  2. Department of Physics, Nims University, Jaipur, 303121, India
  3. Department of Instrumentation and Control Engineering, Amity School of Engineering and Technology, New Delhi, 110061, India
  4. Academic Department, National Institute of Open Schooling, Noida, 201309, India
  

文摘

Temperature-dependent ultrasonic velocities and ultrasonic Grüneisen parameters have been studied in berkelium monopnictides BkX (X N, P, As, Sb) in the temperature range 100-00K along the ${\langle100\rangle}$ , ${\langle110\rangle}$ and ${\langle111\rangle}$ for longitudinal and shear modes of propagation. For the same evaluation we have also computed second and third order elastic constants using Coulomb and Born–Mayer potentials at temperatures 0-00K. The bulk moduli, tetragonal moduli, the ratio of bulk modulus (B T) and isotropic shear modulus (G), i.e., B T/G and Debye temperatures are also evaluated at room temperature using second and third order elastic constants. We found B T/G less than 1.75, so the chosen materials are brittle in nature. Since the Born mechanical stability criterion is satisfied by these compounds, so these are stable at the chosen temperature range. Propagation of ultrasonic wave is found highest in case of BkN due to the high ultrasonic velocity. BkN and BkSb are the best candidates along ${\langle100\rangle}$ for longitudinal mode of propagation and along ${\langle110\rangle}$ for shear mode of propagation, respectively, for thermal uses as their high valued Grüneisen parameters. The results of this investigation are discussed in correlation with other known thermophysical properties.