Zobrazeno 1 - 10
of 557
pro vyhledávání: '"Liarokapis, E"'
The influence of an external static magnetic field (up to 480 mT)on the structural properties of EuTiO$_3$ (ETO) polycrystalline samples was examined by powder XRD at the Elettra synchrotron facilities in the temperature range 100-300K. While the cub
Externí odkaz:
http://arxiv.org/abs/2103.04742
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 indicated the cubic to tetragonal phase transition around 282 K, no m
Externí odkaz:
http://arxiv.org/abs/2002.04285
Publikováno v:
In Physica C: Superconductivity and its applications 15 August 2023 611
Autor:
Liarokapis, E.
A systematic Raman study in the visible carried out on the YBa2Cu316,18Ox (x=6-7) compounds, with isotopic substitution of 18O for 16O, has detected a doping dependent deviation from harmonic behavior for the frequency shift of the in-phase mode, a s
Externí odkaz:
http://arxiv.org/abs/1704.06488
Autor:
Calamiotou, M., Lampakis, D., Zhigadlo, N. D., Katrych, S., Karpinskic, J., Fitch, A., Tsiaklagkanos, P., Liarokapis, E.
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 occur in the optimally doped superconducting sample with respect to t
Externí odkaz:
http://arxiv.org/abs/1509.03519
Publikováno v:
Phys. Rev. B 92, 064102 (2015)
The structural transformation of multiferroic EuTiO$_3$ has been intensively investigated by synchrotron x-ray diffraction at pressures up to 50.3 GPa and temperatures from 50 to 500 K. An antiferrodistortive phase transition from cubic Pm-3m to tetr
Externí odkaz:
http://arxiv.org/abs/1505.05049
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 transition temperature (T_{c}), in order to investigate lattice modifications a
Externí odkaz:
http://arxiv.org/abs/1210.6451
Autor:
Calamiotou, M., Margiolaki, I., Gantis, A., Siranidi, E., Ren, Z. A., Zhao, Z. X., Liarokapis, E.
Publikováno v:
EPL 91, 57005 (2010)
High resolution synchrotron X-ray powder diffraction (SXRPD) was used to study the temperature dependence of the oxygen deficient NdFeAsO$_{0.85}$ superconducting compound. By employing a dense temperature sampling we have managed to reveal unnoticed
Externí odkaz:
http://arxiv.org/abs/1004.1340
Publikováno v:
PRB 80, 214517 (2009)
Combined synchrotron angle-dispersive powder diffraction and micro-Raman spectroscopy are used to investigate the pressure-induced lattice instabilities that are accompanied by T$_{\rm c}$ anomalies in YBa$_{\rm 2}$Cu$_{\rm 4}$O$_{\rm 8}$, in compari
Externí odkaz:
http://arxiv.org/abs/0907.3024
Micro-Raman evidence for topological charge order across the superconducting dome of La_{2-x)SrxCuO4
Publikováno v:
PHYSICAL REVIEW B 73, 174518 (2006)
The doping dependence of the micro-Raman spectra of high quality La_{2-x}Sr_xCuO_4 microcrystals with x=0.0-0.45 has been investigated in the region 10-300 K. The phonon at ~100 cm^{-1} of the orthorhombic phase shows a classical soft mode behavior u
Externí odkaz:
http://arxiv.org/abs/0902.2678