Structural and Electronic Transitions in Ytterbium Metal to 202 GPa

Autor:	Gary N. Chesnut, Yogesh K. Vohra
Rok vydání:	1999
Předmět:	Ytterbium Samarium Crystallography Materials science chemistry X-ray crystallography Hexagonal phase General Physics and Astronomy chemistry.chemical_element Electronic structure Crystal structure Neodymium Molecular electronic transition
Zdroj:	Physical Review Letters. 82:1712-1715
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.82.1712
Popis:	Ytterbium (Yb), a member of the rare earth group metals with a filled $f$ shell and a divalent electronic character, has been studied under static high pressures in a diamond anvil cell to 202 GPa. We report a new transformation from a face-centered-cubic structure to a hexagonal phase with 3 atoms/cell (space group ${P3}_{1}21$ referred to as $\mathrm{hP}3$) at $98\ifmmode\pm\else\textpm\fi{}5\mathrm{GPa}$. This $\mathrm{hP}3$ phase is similar to that observed in trivalent neodymium and samarium at pressures near 40 GPa. Our high pressure study thus clearly demonstrates that Yb is no longer an ``irregular'' member of the rare earth metals, and divalent to trivalent electronic transition is completed at megabar pressures.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b4d234ac6943c007646657ee5de4b06e https://doi.org/10.1103/physrevlett.82.1712 Zobrazit plný text záznamu