Anharmonic properties of TmTe
Department of Physics, Bipin Bihari Post- Graduate College, Jhansi,
Present address: 14/7, Civil Lines, Banda, 210001 Uttar Pradesh, India.
Received in final form: 13 August 2011
Published online: 23 November 2011
Data on elastic constants and associated properties at high temperature for TmTe crystal are presented and discussed starting from primary physical parameters viz. nearest neighbour distance and hardness parameter assuming long- and short-range potentials. When the values of the higher order elastic constants are known for a crystal, many of the anharmonic properties of the crystal can be treated within the limit of the continuum approximation in a quantitative manner. In this study, higher order elastic constants and related properties are computed upto 1000 K for TmTe. The first-order pressure derivatives of second- and third-order elastic constants, the second-order pressure derivatives of second-order elastic constants and partial contractions are also evaluated at different temperatures. The results thus obtained are compared with other available data and found in well agreement with present values.
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2011