23 citations · 60 across the 6 of their papers we have counts for
6 papers
Magnetic field driven novel phase transitions in EuTiO
P. Pappas, M. Calamiotou, M. Polentarutti +3
The influence of an external static magnetic field (up to 480 mT)on the structural properties of EuTiO (ETO) polycrystalline samples was examined by powder XRD at the Elettra s…
Magnetic interactions and the puzzling absence of any Raman mode in EuTiO3
P. Pappas, E. Liarokapis, M. Calamiotou +1
Polycrystalline ceramic samples and a single crystal of EuTiO3 have been investigated by Raman spectroscopy in the temperature range 80-300 K. Although synchrotron XRD data clearly…
Local lattice distortions vs. structural phase transition in NdFeAsO1-xFx
M. Calamiotou, D. Lampakis, N. D. Zhigadlo +5
The lattice properties at low temperatures of two samples of NdFeAsO1-xFx (x=0.05 and 0.25) have been examined in order to investigate possible structural phase transition that may…
Non-linear lattice response of SmFeAsO_{1-x}F_{x} superconductor to hydrostatic pressure
E. Liarokapis, M. Calamiotou, N. D. Zhigadlo +2
Hydrostatic pressure Raman measurements have been carried out on the SmFeAsO series of oxypnictides with varying amount of doping (F substitution for O and Co for Fe) and transitio…
Lattice anomalies in the FeAs tetrahedra of the NdFeAsO superconductor that disappear at T
M. Calamiotou, I. Margiolaki, A. Gantis +4
High resolution synchrotron X-ray powder diffraction (SXRPD) was used to study the temperature dependence of the oxygen deficient NdFeAsO superconducting compound. By empl…
Pressure-induced lattice instabilities and superconductivity in YBa2Cu4O8 and optimally doped YBa2Cu3O7-δ
M. Calamiotou, A. Gantis, E. Siranidi +3
Combined synchrotron angle-dispersive powder diffraction and micro-Raman spectroscopy are used to investigate the pressure-induced lattice instabilities that are accompanied by T$_…