Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-08-29
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 2 figures, few corrections, to be pulished in PRB Rapid comm
Scientific paper
10.1103/PhysRevB.59.R6601
In order to elucidate the nature of the ground state in the heavy-electron system PrInAg_2, we measured its specific heat for temperatures between 60 mK and 2 K in magnetic fields up to 9 T. The peak maximum of the low temperature anomaly in the specific heat (interpreted as Kondo anomaly) shifts from 0.42 K at zero field to 0.45 K at 6 T, and to 0.5 K at 9 T. The data at 3 T (after subtracting the low temperature tail due to a Schottky anomaly) is practically indistinguishable from the zero field data. A low temperature nuclear Schottky anomaly from a hyperfine enhancement of the Pr nuclei was observed in field. Both enhanced hyperfine interaction and the insensitivity of the specific heat anomaly to fields support the hypothesis that the Kondo effect in this system has a non-magnetic origin.
Beyermann W. P.
Canfield Paul. C.
Hundley M. F.
Movshovich Roman
Yatskar A.
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