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Resistance data are reported for americium metal under pressure up to 25 GPa and at temperatures down to 1.3 K. Samples of 243Am with the double hexagonal closed packed structure (dhcp-americium) and also with the face centred cubic structure (fcc-americium) at ambient pressure were studied. In both cases, the superconducting transition temperature of americium increased considerably with pressure, reaching a maximum value of 2.3 K at 6.6 GPa in the case of dhcp-americium. The pressure variation of the superconducting critical temperature and the normal state properties of americium metal exhibited several anomalies, which are discussed with respect to phase transitions established by high pressure X-ray crystallography.

Additional information

Authors: LINK P, JRC Karlsruhe (DE);BRAITHWAITE D, JRC Karlsruhe (DE);BENEDICT U, JRC Karlsruhe (DE);WITTIG J, Forschungszentrum Jülich GmbH, Institut für Festkörperforschung (DE);HAIRE R G, Oak Ridge National Laboratory, Tennessee (US)
Bibliographic Reference: Paper presented: International Conference Actinides '93, Santa Fe (US), September 19-24, 1993
Availability: Available from (1) as Paper EN 37686 ORA
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