Magnetic and Electrical Properties of (Pu,Lu)Pd3
We present measurements of the magnetic susceptibility, heat capacity and electrical resistivity of Pu1-xLuxPd3, with x=0, 0.1, 0.2, 0.5, 0.8 and 1. PuPd3 is an antiferromagnetic heavy fermion compound with TN = 24 K. With increasing Lu doping, both the Kondo and RKKY interaction strengths fall, as judged by the Sommerfeld coefficient g and Néel temperature TN. Fits to a crystal field model of the resistivity also support these conclusions. The paramagnetic effective moment µeff increases with Lu dilution, indicating a decrease in the Kondo screening. In the highly dilute limit, µeff approaches the value predicted by intermediate coupling calculations. In conjunction with an observed Schottky peak at ~60 K in the magnetic heat capacity, corresponding to a crystal field splitting of ~12 meV, a mean-field intermediate coupling model with nearest neighbour interactions has been developed.
LE M. D.;
MCEWEN K.;
COLINEAU Eric;
GRIVEAU Jean-Christophe;
ELOIRDI Rachel;
2010-11-19
AMER PHYSICAL SOC
JRC61231
1098-0121,
https://publications.jrc.ec.europa.eu/repository/handle/JRC61231,
10.1103/PhysRevB.82.155136,
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