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A high-pressure structure in curium linked to magnetism
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2005 (English)In: Science, ISSN 0036-8075, Vol. 309, no 5731, 110-113 p.Article in journal (Refereed) Published
Abstract [en]

Curium ties 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 monoctinic 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 Ill. The results reveal that curium is one of a few elements that has a lattice structure stabilized by magnetism.

Place, publisher, year, edition, pages
2005. Vol. 309, no 5731, 110-113 p.
Keyword [en]
x-ray-diffraction, crystal-structures, transition-metals, 5f electrons, systems
Identifiers
URN: urn:nbn:se:kth:diva-14877DOI: 10.1126/science.1112453ISI: 000230212800068Scopus ID: 2-s2.0-21744456772OAI: oai:DiVA.org:kth-14877DiVA: diva2:332918
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Ahuja, RajeevJohansson, Börje
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