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arXiv · 1011.2160

Magnetic and electrical properties of (Pu,Lu)Pd3

M. D. Le·K. A. McEwen·E. Colineau·J. -C. Griveau·R. Eloirdi
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Abstract

We present measurements of the magnetic susceptibility, heat capacity and electrical resistivity of Pu$_{1-x}$Lu$_x$Pd$_3$, with $x$=0, 0.1, 0.2, 0.5, 0.8 and 1. PuPd$_3$ is an antiferromagnetic heavy fermion compound with $T_N=24$~K. With increasing Lu doping, both the Kondo and RKKY interaction strengths fall, as judged by the Sommerfeld coefficient $γ$ and Néel temperature $T_N$. Fits to a crystal field model of the resistivity also support these conclusions. The paramagnetic effective moment $μ_{\mathrm{eff}}$ increases with Lu dilution, indicating a decrease in the Kondo screening. In the highly dilute limit, $μ_{\mathrm{eff}}$ approaches the value predicted by intermediate coupling calculations. In conjunction with an observed Schottky peak at $\sim$60~K in the magnetic heat capacity, corresponding to a crystal field splitting of $\sim$12~meV, a mean-field intermediate coupling model with nearest neighbour interactions has been developed.

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M. D. Le, K. A. McEwen, E. Colineau, J. -C. Griveau, R. Eloirdi. 2010-11-09. Magnetic and electrical properties of (Pu,Lu)Pd3. https://doi.org/10.1103/physrevb.82.155136

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