Physics: A high-pressure structure in curium linked to magnetism

S. Heathman, R. G. Haire, T. Le Bihan, A. Lindbaum, M. Idiri, P. Normile, S. Li, R. Ahuja, B. Johansson, G. H. Lander

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

104 Zitate (Scopus)

Abstract

Curium lies at the center of the actinide series and has a half-filled shell with seven 5f electrons spatially residing inside its radon core. As a function of pressure, curium exhibits five different crystallographic phases up to 100 gigapascals, of which all but one are also found in the preceding element, americium. We describe here a structure in curium, Cm III, with monoclinic symmetry, space group C2/c, found at intermediate pressures (between 37 and 56 gigapascals). Ab initio electronic structure calculations agree with the observed sequence of structures and establish that it is the spin polarization of curium's 5f electrons that stabilizes Cm III. The results reveal that curium is one of a few elements that has a lattice structure stabilized by magnetism.

OriginalspracheEnglisch
Seiten (von - bis)110-113
Seitenumfang4
FachzeitschriftScience
Jahrgang309
Ausgabenummer5731
DOIs
PublikationsstatusVeröffentlicht - 1 Juli 2005
Extern publiziertJa

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