Narayani Choudhury
Articles written in Pramana – Journal of Physics
Volume 30 Issue 5 May 1988 pp 423-428 Condensed Matter Physics
Lattice dynamics of MgSiO3 perovskite
Narayani Choudhury S L Chaplot K R Rao Subrata Ghose
A lattice dynamical study of the geophysically important mineral MgSiO3 in its orthorhombic perovskite phase, with space group Pnma (
Volume 63 Issue 1 July 2004 pp 73-79
Inelastic neutron scattering and lattice dynamics studies in complex solids
Mala N Rao R Mittal Narayani Choudhury S L Chaplot
At Trombay, lattice dynamics studies employing coherent inelastic neutron scattering (INS) experiments have been carried out at the two research reactors, CIRUS and Dhruva. While the early work at CIRUS involved many elemental solids and ionic molecular solids, recent experiments at Dhruva have focussed on certain superconductors (cuprates and intermetallics), geophysically important minerals (Al2SiO5, ZrSiO4, MnCO3) and layered halides (BaFCl, ZnCl2). In most of the studies, theoretical modelling of lattice dynamics has played a significant role in the interpretation and analysis of the results from experiments. This talk summarises the developments and current activities in the field of inelastic neutron scattering and lattice dynamics at Trombay.
Volume 71 Issue 4 October 2008 pp 819-828 Invited Papers
Inelastic neutron scattering and lattice dynamics of minerals
Narayani Choudhury S L Chaplot
We review current research on minerals using inelastic neutron scattering and lattice dynamics calculations. Inelastic neutron scattering studies in combination with first principles and atomistic calculations provide a detailed understanding of the phonon dispersion relations, density of states and their manifestations in various thermodynamic properties. The role of theoretical lattice dynamics calculations in the planning, interpretation and analysis of neutron experiments are discussed. These studies provide important insights in understanding various anomalous behaviour including pressure-induced amorphization, phonon and elastic instabilities, prediction of novel high pressure phase transitions, high pressure{temperature melting, etc.
Volume 97, 2023
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