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Drastic change of the ferromagnetic properties of the ternary germanide GdTiGe through hydrogen insertion

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAUDIN, Etienne
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMATAR, Samir F.
hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorPÖTTGEN, Rainer
hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorEUL, Matthias
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHEVALIER, Bernard
dc.date.issued2011
dc.identifier.issn0020-1669
dc.description.abstractEnHydrogen absorption of the CeFeSi- and CeScSi-type forms of GdTiGe was performed. Before hydrogenation they show an antiferromagnetic transition at around 412 K and a ferromagnetic transition at 376 K, respectively. Hydrogenation of both forms leads to formation of the same hydride GdTiGeH which crystallizes with a filled CeScSi-type structure where all the [Gd(4)] tetrahedra are filled by hydrogen. This hydride is paramagnetic in the temperature range 4-300 K. The slightly negative value of the paramagnetic Curie temperature θ(p) confirms that all ferromagnetic interactions were destroyed in the case of the CeScSi-type form. From first-principles calculations with the PAW GGA methodology, the localization of hydrogen within the [Gd(4)] tetrahedra was confirmed through energetic stabilization. It was also seen that the energy changes significantly with volume, indicating the itinerant (delocalized) role of the electrons in the magnetism.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enDrastic change of the ferromagnetic properties of the ternary germanide GdTiGe through hydrogen insertion
dc.typeArticle de revue
dc.identifier.doi10.1021/ic201579r
dc.subject.halChimie/Matériaux
dc.subject.halChimie/Chimie inorganique
bordeaux.journalInorganic Chemistry
bordeaux.page11046-11054
bordeaux.volume50
bordeaux.issue21
bordeaux.peerReviewedoui
hal.identifierhal-00641699
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00641699v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Inorganic%20Chemistry&rft.date=2011&rft.volume=50&rft.issue=21&rft.spage=11046-11054&rft.epage=11046-11054&rft.eissn=0020-1669&rft.issn=0020-1669&rft.au=GAUDIN,%20Etienne&MATAR,%20Samir%20F.&P%C3%96TTGEN,%20Rainer&EUL,%20Matthias&CHEVALIER,%20Bernard&rft.genre=article


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