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Magnetic and electrical properties of (Pu,Lu)Pd-3

Le, MD; McEwen, KA; Colineau, E; Griveau, JC; Eloirdi, R; (2010) Magnetic and electrical properties of (Pu,Lu)Pd-3. Physical Review B , 82 (15) , Article 155136. 10.1103/PhysRevB.82.155136.

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Abstract

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 T-N = 24 K. With increasing Lu doping, both the Kondo and Ruderman-Kittel-Kasuya-Yosida interaction strengths fall, as judged by the Sommerfeld coefficient gamma and Neel temperature T-N. Fits to a crystal-field model of the resistivity also support these conclusions. The paramagnetic effective moment mu(eff) increases with Lu dilution, indicating a decrease in the Kondo screening. In the highly dilute limit, mu(eff) approaches the value predicted by intermediate coupling calculations. In conjunction with an observed Schottky peak at similar to 60 K in the magnetic heat capacity, corresponding to a crystal field splitting of similar to 12 meV, a mean-field intermediate coupling model with nearest-neighbor interactions has been developed.

Type: Article
Title: Magnetic and electrical properties of (Pu,Lu)Pd-3
DOI: 10.1103/PhysRevB.82.155136
Publisher version: http://dx.doi.org/10.1103/PhysRevB.82.155136
Language: English
Keywords: intermetallic compounds, resistivity, spectra, alloys
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: http://discovery.ucl.ac.uk/id/eprint/1437342
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