Elastic Behaviour and Lattice Vibrations in bcc V and Nb |
| A. Verma, M.L. Verma Department of Physics, G.G.D.S.D. College, Palwal 121102, India and R.P.S. Rathore Department of Physics, R.B.S. College, Agra 282002, India |
| Received: February 23, 1996 |
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| A model is developed by extending the generalised form of exponential potential known as extended generalised exponential potential to account for: (a) a realistic realization of interactions in all separations in general and that of small separations in particular, (b) three-body and electronic effects into the interaction in an alternative and simpler form, (c) a model free from usual fitting procedure. The model is employed to compute the cohesive energy, phonon spectra and second- and third-order elastic constants for group VA bcc metals V and Nb. The computed results showing good agreement with the experimental findings lend reliability and credibility to the potential. |
| DOI: 10.12693/APhysPolA.90.547 PACS numbers: 63.20.Dj, 62.20.Dc |