High pressure antiferrodistortive phase transition in mixed crystals of EuTiO3 and SrTiO3

Autor: Paraskevas Parisiades, Francesco Saltarelli, Efthymios Liarokapis, Jürgen Köhler, Annette Bussmann-Holder

Publikováno v: AIP Advances, Vol 6, Iss 6, Pp 065019-065019-7 (2016)

We report a detailed high pressure study on Eu1−xSrxTiO3 polycrystalline samples using synchrotron x-ray diffraction. We have observed a second-order antiferrodistortive phase transition for all doping levels which corresponds to the transition tha

Externí odkaz: https://doaj.org/article/e4e9a63dbdd34231b1de208503148020

Melting properties by X-ray absorption spectroscopy: common signatures in binary Fe–C, Fe–O, Fe–S and Fe–Si systems

Autor: Guillaume Morard, François Guyot, Tetsuo Irifune, R. Torchio, Francesca Miozzi, Angelika Dorothea Rosa, Innokenty Kantor, Daniele Antonangeli, Simone Anzellini, Marion Harmand, Paraskevas Parisiades, E. Boulard, Silvia Boccato

Publikováno v: Scientific Reports, Vol 10, Iss 1, Pp 1-13 (2020)
'Scientific Reports ', vol: 10, pages: 11663-1-11663-13 (2020)
Scientific Reports
Scientific Reports, 2020, 10 (1), ⟨10.1038/s41598-020-68244-3⟩
Scientific Reports, Nature Publishing Group, 2020, 10 (1), ⟨10.1038/s41598-020-68244-3⟩

International audience; X-ray absorption spectroscopy (XAS) is a widely used technique to probe the local environment around specific atomic species. Applied to samples under extreme pressure and temperature conditions, XAS is sensitive to phase tran

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f8fbbb353970dca69614c2376eff8de
http://link.springer.com/article/10.1038/s41598-020-68244-3

Investigation of the high pressure phase BiS2: Temperature-resolved structure and compression behavior to 60 GPa

Autor: Yu-Sheng Chen, Martin Bremholm, Simone M. Kevy, Hazel Reardon, Davide Ceresoli, Lars F. Lundegaard, Paraskevas Parisiades, Morten Nielsen

Publikováno v: Kevy, S M, Nielsen, M B, Lundegaard, L F, Ceresoli, D, Chen, Y S, Reardon, H, Parisiades, P & Bremholm, M 2019, ' Investigation of the high pressure phase BiS 2 : Temperature-resolved structure and compression behavior to 60 GPa ', Journal of Alloys and Compounds, vol. 789, pp. 588-594 . https://doi.org/10.1016/j.jallcom.2019.03.023
Journal of alloys and compounds 789 (2019): 588–594. doi:10.1016/j.jallcom.2019.03.023
info:cnr-pdr/source/autori:Kevy, Simone M.; Nielsen, Morten B.; Lundegaard, Lars F.; Ceresoli, Davide; Chen, Yu-Sheng; Reardon, Hazel; Parisiades, Paraskevas; Bremholm, Martin/titolo:Investigation of the high pressure phase BiS2: Temperature-resolved structure and compression behavior to 60 GPa/doi:10.1016%2Fj.jallcom.2019.03.023/rivista:Journal of alloys and compounds/anno:2019/pagina_da:588/pagina_a:594/intervallo_pagine:588–594/volume:789

BiS 2 was synthesized using a multi-anvil large volume press at a pressure and temperatures of 5.5 GPa and 1250 °C, respectively, and was then recovered at ambient conditions. Using data collection from single crystal synchrotron X-ray diffraction e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d6621435324d0ec8b6d6fb344a92e2b
https://doi.org/10.1016/j.jallcom.2019.03.023

Modulated Structures in PbHfO3 Crystals at High-Pressure-High-Temperature Conditions

Autor: Alexey Filimonov, Andrzej Majchrowski, Paraskevas Parisiades, Yurii Bronwald, R. G. Burkovsky, Alexey Bosak, G. A. Lityagin, A E Fotiadi, Krystian Roleder, Daria Andronikova, Maria Knjazeva

Publikováno v: Defect and Diffusion Forum. 386:149-155

Lead hafnate single crystals were characterized using single crystal x-ray diffraction under simultaneous application of hydrostatic pressure and high temperatures. The information on the structure of two intermediate phases, situated between antifer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::061c31afd167d04fbf4d1b5f18b84547
https://doi.org/10.4028/www.scientific.net/ddf.386.149

Melting curve of elemental zirconium

Autor: Federico Cova, Gaston Garbarino, Paraskevas Parisiades

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2019, 100, pp.054102. ⟨10.1103/PhysRevB.100.054102⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2019, 100, pp.054102. ⟨10.1103/PhysRevB.100.054102⟩

Melting experiments require rapid data acquisition due to instabilities of the molten sample and optical drifting due to the high required laser power. In this work, the melting curve of zirconium has been determined for the first time up to 80 GPa a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bec730eeb98cc056a60d4d3b87b0a7c8
http://arxiv.org/abs/1904.08235