Study of diffuse scattering under hydrostatic pressure in PbMg1/3Nb2/3O3 (2009)
Padmanabhan, B, Gvasaliya, S N, Roessli, B, Strassle, Th, Cowley, R A, ...
We report measurements of the evolution of the diffuse scattering in a single crystal PbMg1/3Nb2/3O3 as a function of hydrostatic pressure. Upon applying pressure the diffuse scattering intensity...
Diffuse scattering from the lead-based relaxor ferroelectric PbMg_1/3Ta_2/3O_3 (2009)
Cervellino, A., Gvasaliya, S. N., Zaharko, O., Roessli, B., Rotaru, G. M., Cowley, R. A., ...
The relaxor ferroelectric PbMg_1/3Ta_2/3O_3 was studied by single-crystal neutron and synchrotron x-ray diffraction and its detailed atomic structure has been modeled in terms of static...
Spin-glass state and long-range magnetic order in Pb(Fe1/2Nb1/2)O3 (2009)
Roessli, B., Amato, A., Gvasaliya, S. N., Lushnikov, S. G., Shaplygina, T. A.
We have investigated the magnetic ground-state of the multiferroic relaxor ferroelectric Pb(Fe$_{1/2}$Nb$_{1/2}$)O$_{3}$ with $\mu$SR spectroscopy and neutron scattering. We find that a transition to...
Gvasaliya, S. N., Roessli, B., Kojima, S., Lushnikov, S. G., ...
We show that the neutron diffuse scattering in relaxor ferroelectric (1-x)PbZn$_{1/3}$Nb$_{2/3}$O$_{3}$ - x PbTiO$_{3}$ (x=0.07) consists of two components. The first component is strictly elastic...
Manipulating the magnetic structure by electric fields in multiferroic ErMn2O5 (2007)
Bodenthin, Y., Staub, U., Garcia-Fernandez, M., Janoschek, M., Schlappa, J., Golovenchits, E. I., ...
Based on measurements of soft x-ray magnetic diffraction under in-situ applied electric field, wereport on significantly manipulation and exciting of commensurate magnetic order in multiferroic...
The Structural Phase Transition of the Relaxor Ferroelectric 68%PbMg1/3Nb2/3O3-32%PbTiO3 (2006)
Gvasaliya, S. N., Roessli, B., Cowley, R. A., Kojima, S., Lushnikov, S. G.
Neutron scattering techniques have been used to study the relaxor ferroelectric 0.68PbMg1/3Nb2/3O3-0.32PbTiO3 denoted in this paper as 0.68PMN-0.32PT. On cooling, these relaxor ferroelectrics have a...
Gvasaliya, S. N., Pomjakushin, V., Roessli, B., Straessle, Th., Klotz, S., Lushnikov, S. G.
The crystal structure of the PbMg$_{1/3}$Ta$_{2/3}$O$_3$ (PMT) relaxor ferroelectric was studied under hydrostatic pressure up to $\sim 7$ GPa by means of powder neutron diffraction. We find a...
Quasi-Elastic Scattering, Random Fields and phonon-coupling effects in PbMg1/3Nb2/3O3 (2005)
Gvasaliya, S N, Roessli, B, Cowley, R A, Hubert, P, Lushnikov, S G
The low-energy part of the vibration spectrum in PbMg$_{1/3}$Nb$_{2/3}$O$_3$ (PMN) relaxor ferroelectric has been studied by neutron scattering above and below the Burns temperature, T$_d$. The...
Lushnikov, S. G., Gvasaliya, S. N., Katiyar, R. S.
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 dependence of the...
Dynamics of cubic-tetragonal phase transition in KNbO$_3$ perovskite (2004)
Gvasaliya, S. N., Roessli, B., Cowley, R. A., Lushnikov, S. G., Choubey, A., Gunter, P.
The low-energy part of the vibration spectrum in KNbO$_3$ was studied by cold neutron inelastic scattering in the cubic phase. In addition to acoustic phonons, we observe strong diffuse scattering,...
Gvasaliya, S. N., Roessli, B., Sheptyakov, D., Lushnikov, S. G., Shaplygina, T. A.
Neutron scattering investigations were carried out in PbMg$_{1/3}$Ta$_{2/3}$O$_3$ and BaMg$_{1/3}$Ta$_{2/3}$O$_3$ complex perovskites. The crystal structure of both compounds does not show any phase...
Gvasaliya, S. N., Lushnikov, S. G., Roessli, B.
The low-energy part of vibration spectrum in PbMg$_{1/3}$Nb$_{2/3}$O$_3$ relaxor ferroelectric was studied by inelastic neutron scattering. We observed the coexistence of a resolution-limited central...