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Low-temperature resistance measurements were performed on UTe and USe crystals in the pressure range from 1 GPa to 20 GPa. The Curie temperature, obtained as the maximum in the temperature derivative dR/dT, increases strongly with pressure. It has a maximum at 7.5 GPa for UTe and around 4.5 GPa for USe followed by a decrease with smaller slope at higher pressures. For UTe another anomaly in the R-T characteristic is observed above 10 GPa and ascribed to the presence of the B2 phase, which is known to form in a very sluggish phase transformation. The `Kondo like' behaviour of UTe at ambient conditions, previously reported, seems to disappear under pressure. USe shows a similar pressure dependence of the Curie temperature as UTe, with a maximum Curie temperature of 190 K at 4.5 GPa.

Additional information

Authors: LINK P, JRC Karlsruhe (DE);BENEDICT U, JRC Karlsruhe (DE);WITTIG J, Forschungszentrum Jülich, Institut für Festkörperforschung (DE);WÜHL H, Universität Karlsruhe, Institut für Experimentelle Kernphysik (DE);WUHL H, Universitat Karlsruhe, Institut fur Experimentelle Kernphysik (DE)
Bibliographic Reference: Paper presented: 22. Journées des Actinides, Méribel (FR), April 22-24, 1992
Availability: Text not available
Record Number: 199210812 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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