A P Roy
Articles written in Pramana – Journal of Physics
Volume 2 Issue 4 April 1974 pp 179-188 Solids
Phonon frequencies in beryllium along the principal symmetry directions have been determined by means of the slow neutron inelastic scattering technique. The data are analysed in terms of a six-neighbour force constant model and the force constants are evaluated. It is concluded that strong tensor forces are present in beryllium and the importance of this finding to basic theories of lattice dynamics is pointed out.
Volume 20 Issue 3 March 1983 pp 183-192 Solid State Physics
Detailed Raman scattering investigation of LiKSO4 in phases II and III across the transition temperature
Volume 32 Issue 1 January 1989 pp 57-61 Condensed Matter Physics
We have measured the kinetics of phase transition in LiKSO4 (
Volume 47 Issue 2 August 1996 pp 145-150
Raman scattering investigation of phase transition in the ferroelectric Ba0.95Ca0.05TiO3 is reported. The results suggest onset of significant dynamic disorder at 105°C. This corroborates findings of recent structural study regarding large positional disorder associated with Ti and O1 atoms well below the tetragonal to cubic transition temperature (∼150°C).
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