Abstract
The specific heat of several metallic alloys, (UxTh1-x)S and (UxTh1-x)Se, have been measured between 1.5 and 10K. Large increases of the electronic specific heat coefficient gamma with x were observed at low uranium concentration (x<0.15):d gamma /dx=126 and approximately=450 mJ (U mol)-1K-2 for sulphides and selenides respectively. The normalised ratios between the 0K increments in the magnetic susceptibility chi and gamma , pi 2kB2 dchi /3 mu B2 d gamma , were found to be equal to 2.4 and 3.0 respectively. The results are consistent with a strong-coupled Kondo description (of characteristic temperature 150K for S and 50K for Se compounds) rather than with 5f virtual bound states at the Fermi level. Complementary magnetic susceptibility and electrical resistivity measurements have allowed the authors to determine the critical concentration for the ferromagnetism threshold in (UxTh1-x)Se:x approximately=0.27 (as compared with 0.43 for (UxTh1-x)S).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
