Lattice dynamical calculations of infinite layer iron oxides SrFeO2 and CaFeO2 (2008)
Mittal, R., Chaplot, S. L., Su, Y.
We report extensive lattice dynamical calculations of the newly discovered infinite-layer iron oxides SrFeO2 and CaFeO2. For SrFeO2, the parameters of the interatomic potential have been determined...
Mishra, S. K., Choudhury, N., Chaplot, S. L., Krishna, P. S. R., Mittal, R.
Neutron diffraction studies using powder samples have been used to understand the complex sequence of low temperature phase transitions of NaNbO3 in the temperature range from 12 K-350 K. Detailed...
Sen, A., Rao, Mala N., Mittal, R, Chaplot, S. L.
We report a phonon density of states measurement of $\alpha$-ZnCl$_{2}$ using the coherent inelastic neutron scattering technique and a lattice dynamical calculation in four crystalline phases of...
Lattice vibrations in high-pressure phases of LiYF$_{4}$ (2005)
Sen, A., Chaplot, S. L., Mittal, R.
Possible variations in the dynamical behaviour of LiYF$_{4}$ due to its several structural changes under pressure are examined by making use of the complementary techniques of quasi-harmonic lattice...
A VLBI Study of the Gravitational Lens JVAS B0218+357 (2004)
Mittal, R., Porcas, R., Wucknitz, O., Biggs, A.
We present the results of phase-referenced VLBA+Effelsberg observations at five frequencies of the gravitational lens B0218+357 to establish the precise registration of the A and B lensed image...
Vibrational and thermodynamic properties of high-pressure phases in LiYF_4 (2004)
Sen, A., Chaplot, S. L., Mittal, R.
Possible variations in the dynamical behaviour of LiYF$_{4}$ due to its structural changes following several pressure-induced phase transitions are examined by making use of the complementary...
Inelastic neutron scattering and lattice dynamics of minerals (2002)
Chaplot, SL, Choudhury, N, Ghose, S, Rao, MN, Mittal, R, Goel, P
Lattice dynamics calculations and phonon dispersion measurements of zircon, ZrSiO4 (2000)
Mittal, R, Chaplot, S L, Parthasarathy, R, Bull, M J, Harris, M J
Phonon dispersion relation in zircon: an inelastic neutron scattering study (1997)
Mittal, R, Chaplot, S L, Pathasarathi, R, Harris, M J, Bull, M J