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Polyamorphism in cerium based bulk metallic glasses: Electronic and structural properties under pressure and temperature by x-ray absorption techniques

hal.structure.identifierInstitut de minéralogie et de physique des milieux condensés [IMPMC]
dc.contributor.authorBELHADI, L.
hal.structure.identifierInstitut de minéralogie et de physique des milieux condensés [IMPMC]
dc.contributor.authorDECREMPS, Frédéric
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorPASCARELLI, Sakura
hal.structure.identifierInstitut de minéralogie et de physique des milieux condensés [IMPMC]
dc.contributor.authorCORMIER, Laurent
hal.structure.identifierInstitut de minéralogie et de physique des milieux condensés [IMPMC]
dc.contributor.authorLE GODEC, Yann
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGORSSE, Stéphane
hal.structure.identifierSynchrotron SOLEIL [SSOLEIL]
dc.contributor.authorBAUDELET, François
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorMARINI, C.
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorGARBARINO, Gastón
dc.date.issued2013
dc.identifier.issn0003-6951
dc.description.abstractEnHigh pressure and high temperature x-ray absorption near edge spectroscopy experiments have been carried out on Ce60Al20Cu20 bulk metallic glass showing an electronic delocalization of the 4f-electron of cerium under pressure. In parallel, high pressure extended x-ray absorption fine structure spectroscopy reveals large structural modifications of the cerium local environment. This study provides experimental evidence that an electronic driven structural transformation occurs in cerium based bulk metallic glasses (Ce-BMGs). The effect of temperature on the hysteresis of this amorphous-amorphous phase transition is also discussed, suggesting the existence of a critical point in the phase diagram of Ce-BMGs. This work will encourage further investigations on Ce-based metallic glasses phase diagrams in order to support, or refute, the actual theoretical understanding of polyamorphism.
dc.language.isoen
dc.publisherAmerican Institute of Physics
dc.subject.enAluminium alloys
dc.subject.enAmorphous state
dc.subject.enCerium alloys
dc.subject.enCopper alloys
dc.subject.enEXAFS
dc.subject.enGlass transition
dc.subject.enHigh-pressure solid-state phase transformations
dc.subject.enHigh-temperature effects
dc.subject.enMetallic glasses
dc.subject.enPolymorphism
dc.subject.enXANES
dc.title.enPolyamorphism in cerium based bulk metallic glasses: Electronic and structural properties under pressure and temperature by x-ray absorption techniques
dc.typeArticle de revue
dc.identifier.doi10.1063/1.4820434
dc.subject.halChimie/Matériaux
bordeaux.journalApplied Physics Letters
bordeaux.page111905
bordeaux.volume103
bordeaux.issue11
bordeaux.peerReviewedoui
hal.identifierhal-00871644
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00871644v1
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