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 language | English |
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Pages (from-to) | 55-58 |
Number of pages | 4 |
Journal | Zeitschrift für Physik B Condensed Matter |
Volume | 97 |
Issue number | 1 |
DOIs | |
State | Published - Mar 1995 |
Externally published | Yes |
Keywords
- 65.40.E
- 74.30.C
- 74.70.T