Hydrogenation studies on NdScSi and NdScGe
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | TENCÉ, Sophie | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | MAHON, Tadgh | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | GAUDIN, Etienne | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | CHEVALIER, Bernard | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | BOBET, Jean-Louis | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | FLACAU, Roxana | |
hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
dc.contributor.author | HEYING, Birgit | |
hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
dc.contributor.author | RODEWALD, Ute Ch. | |
hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
dc.contributor.author | PÖTTGEN, Rainer | |
dc.date.issued | 2016 | |
dc.identifier.issn | 0022-4596 | |
dc.description.abstractEn | NdScSi and NdScGe were synthesized from the elements via arc-melting and subsequent annealing. Their ordered La2Sb type structures, with space group I4/mmm, were refined from single crystal X-ray diffractometer data: a=428.94(6) and b=1570.5(3) pm, wR2=0.0395, 309 F2 values for NdScSi and a=431.2(1) and c=1581.3(5) pm, wR2=0.1220, 227 F2 values for NdScGe, with 11 variables per refinement.Hydrogen insertion was performed on both Nd-based intermetallics by solid/gas reaction. Hydrogen uptake keeps the pristine compound space group but yields an anisotropic expansion of the unit cell with a large increase of c (≈+7%) and a slight decrease of a (≈−1.7%) parameters. Hydrogen absorption at 350 °C and under 5 bar of H2 pressure shows that the hydride NdScSiH1.48(5) is formed. An in-situ neutron diffraction study during the deuteration of NdScSi reveals for the first time in a CeScSi-type compound, the possibility to fill two interstitial sites with deuterium atoms, leading to the composition NdScSiD1.5 for the deuteride adopting then the La2Fe2Se2O3-type structure.From magnetization measurements, we evidence that hydrogenation strongly reduces the Curie temperature of NdScSi (TC=175 K) and NdScGe (TC=194 K) since NdScSiH1.5 and NdScGeHx undergo a magnetic transition at 4 K and around 2 K, respectively. | |
dc.language.iso | en | |
dc.publisher | Elsevier | |
dc.subject.en | Silicides | |
dc.subject.en | Germanides | |
dc.subject.en | Crystal chemistry | |
dc.subject.en | Hydrogenation reactions | |
dc.subject.en | Neutron diffraction | |
dc.subject.en | Magnetic properties | |
dc.title.en | Hydrogenation studies on NdScSi and NdScGe | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1016/j.jssc.2016.02.017 | |
dc.subject.hal | Chimie/Matériaux | |
bordeaux.journal | Journal of Solid State Chemistry | |
bordeaux.page | 168-174 | |
bordeaux.volume | 242 | |
bordeaux.issue | 2 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-01362245 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-01362245v1 | |
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