52 citations · 155 across the 6 of their papers we have counts for
6 papers
Reduction of the ordered magnetic moment in YMnO3 with hydrostatic pressure
M. Janoschek, B. Roessli, L. Keller +3
YMnO3 exhibits a ferroelectric transition at high temperature (~ 900 K) and magnetic ordering at T_N ~ 70 K where the dielectric constant shows an anomaly indicative of the magneto…
Quasi-Elastic Scattering, Random Fields and phonon-coupling effects in PbMg1/3Nb2/3O3
S N Gvasaliya, B Roessli, R A Cowley +2
The low-energy part of the vibration spectrum in PbMgNbO (PMN) relaxor ferroelectric has been studied by neutron scattering above and below the Burns temperatur…
Behavior of Optical Phonons near the Diffuse Phase Transition in Relaxor Ferroelectric PbMg1/3Ta2/3O3
S. G. Lushnikov, S. N. Gvasaliya, R. S. Katiyar
Raman scattering in relaxor ferroelectric PbMg1/3Ta2/3O3 (PMT) was investigated in the single crystalline form in the temperature range of 20 - 295 K. Anomalous temperature depende…
Dynamics of cubic-tetragonal phase transition in KNbO perovskite
S. N. Gvasaliya, B. Roessli, R. A. Cowley +3
The low-energy part of the vibration spectrum in KNbO was studied by cold neutron inelastic scattering in the cubic phase. In addition to acoustic phonons, we observe strong di…
Neutron scattering study of PbMgTaO and BaMgTaO complex perovskites
S. N. Gvasaliya, B. Roessli, D. Sheptyakov +2
Neutron scattering investigations were carried out in PbMgTaO and BaMgTaO complex perovskites. The crystal structure of both compounds does…
Disorder and relaxation mode in the lattice dynamics of PbMgNbO relaxor ferroelectric
S. N. Gvasaliya, S. G. Lushnikov, B. Roessli
The low-energy part of vibration spectrum in PbMgNbO relaxor ferroelectric was studied by inelastic neutron scattering. We observed the coexistence of a resolut…