Non-Fermi-liquid behavior in the specific heat over two decades of temperature in doped UPt{sub 3}
- Institut fuer Physik, Universitaet Augsburg, Memminger Strasse 6, D-86159 Augsburg (Germany)
We have discovered, in contrast with most dopants {ital M}, that Hf (Zr) can be doped to quite high levels in U{sub 1{minus}{ital x}}M{sub {ital x}}Pt{sub 3}, up to {ital x}=0.15 (0.30). Above 5{percent} doping, the temperature dependence of the low-temperature upturn in {ital C}/{ital T} (specific heat divided by temperature) changes from {ital T}{sup 3}ln{ital T} (indicative of spin fluctuations) to {ital T}ln{ital T} [indicative of non-Fermi-liquid (NFL) behavior]. The specific heat NFL temperature dependence has been measured down to 0.1 K and is seen over more than two decades in temperature. The field dependence of the NFL specific heat is small, consistent with a quadrupolar moment model interpretation. A possible reason for the NFL behavior is discussed. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 285958
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 54, Issue 2; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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