Show simple item record

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTENCÉ, Sophie
hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorHEYING, Birgit
hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorJANKA, Oliver
hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorPÖTTGEN, Rainer
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHEVALIER, Bernard
dc.date.issued2017
dc.identifier.issn0925-8388
dc.description.abstractEnPolycrystalline CeNiZn (ZrNiAl type, P2m, a = 715.6 (4), c = 388.4 (2) pm) forms a new hydride CeNiZnH1.2(1) under hydrogen exposure (10 bar) at 423 K. The resulting hydride crystallizes in a hexagonal structure (P6/mmm) with the unit cell parameters a = 433.19 (2) and c = 424.37 (2) pm. Thus, hydrogen atom insertion yields a structural transition from a ZrNiAl- to an AlB2-type structure with a high volume cell expansion of +20.1%. The magnetic, thermal and transport properties of CeNiZnH1.2(1) were investigated. Susceptibility and specific heat measurements do not reveal magnetic order down to 1.8 K but most likely the presence of ferromagnetic correlations due to the proximity of a ferromagnetic order or a nonmagnetic atom disorder spin-glass state. Moreover, the cerium valence is modified from an intermediate to a trivalent state, a change that results from the decrease of the hybridization strength between conduction and Ce (4f) electrons upon hydrogenation. Transport measurements also evidence a deviation from the typical resistivity behavior of metallic systems. Several scenarios are conceived to explain this change, in particular weak localization effect, knowing that it rarely occurs upon hydrogenation of intermetallics.
dc.language.isoen
dc.publisherElsevier
dc.subject.enCerium intermetallics
dc.subject.enMagnetic properties
dc.subject.enZinc
dc.subject.enTransport properties
dc.subject.enHydrogenation reaction
dc.title.enHydrogenation-induced cerium valence change in CeNiZn
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jallcom.2017.07.038
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Alloys and Compounds
bordeaux.page515-519
bordeaux.volume724
bordeaux.peerReviewedoui
hal.identifierhal-01565192
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01565192v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Alloys%20and%20Compounds&rft.date=2017&rft.volume=724&rft.spage=515-519&rft.epage=515-519&rft.eissn=0925-8388&rft.issn=0925-8388&rft.au=TENC%C3%89,%20Sophie&HEYING,%20Birgit&JANKA,%20Oliver&P%C3%96TTGEN,%20Rainer&CHEVALIER,%20Bernard&rft.genre=article


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record