Specific heat and magnetic susceptibility of UPt3 and UBe13 at mK-temperatures

E. A. Schuberth, K. Kloss, J. Schupp, K. Andres

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Abstract

We have measured the specific heat capacity of a single crystal of UPt3 in zero magnetic field, in 2 T, and in 4 T (above {Mathematical expression})with the adiabatic warm-up method down to a final temperature of 15 mK. The results prove our previous assumption that the normal state of UPt3 exhibits a similar, slightly modified specific heat anomaly around 20 mK as is present in the superconducting state. It is most probably a signature of long range magnetic order. Entropy balance above TCis fulfilled if both low-temperature peaks are included. For UBe13 (in the superconducting state) we find no specific heat anomaly down to 24 mK but a deviation from the power law valid at higher temperatures. DC-magnetization measurements on a second single crystal of UPt3 in a SQUID system yield a temperature dependence ∼T2 between 150 and 20 mK extending the temperature range of earlier measurements by a factor of 4.

Original languageEnglish
Pages (from-to)55-58
Number of pages4
JournalZeitschrift für Physik B Condensed Matter
Volume97
Issue number1
DOIs
StatePublished - Mar 1995
Externally publishedYes

Keywords

  • 65.40.E
  • 74.30.C
  • 74.70.T

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