Phonon density-of-states in bcc and hcp Eu metal under high pressure measured by151Eu nuclear inelastic scattering of synchrotron radiation

Autor:	U. Ponkratz, Gerhard Wortmann, B. Bielemeier, K. Rupprecht
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Forward scatter Phonon Chemistry Synchrotron radiation Inelastic scattering Condensed Matter Physics Divalent Metal Condensed Matter::Materials Science X-ray Raman scattering Condensed Matter::Superconductivity High pressure visual_art visual_art.visual_art_medium Condensed Matter::Strongly Correlated Electrons Atomic physics
Zdroj:	High Pressure Research. 28:545-551
ISSN:	1477-2299 0895-7959
DOI:	10.1080/08957950802541310
Popis:	We present the first study of the phonon density-of-states (DOS) of mixed-valent (m.v.) Eu metal in the bcc-phase at 10 GPa and in the hcp-phase at 17 GPa using 151Eu nuclear inelastic scattering of synchrotron radiation. In both cases, features in the phonon-DOS exhibit shifts to lower energies when compared with stable divalent or trivalent rare-earth metals with larger molar volumes. These anomalous properties are caused by the strong m.v. state of Eu in both phases, determined independently by 151Eu nuclear forward scattering, and are discussed in conjunction with a recent study of the Sm phonon-DOS in divalent and m.v. SmS.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::71f546588a70944f13cf799ad4ec3ab8 https://doi.org/10.1080/08957950802541310 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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