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Magnetic and electrical properties of (Pu,Lu)Pd_3

机译：（Pu，Lu）Pd_3的磁电性能

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摘要

We present measurements of the magnetic susceptibility, heat capacity, and electrical resistivity of Pu_(1-x)Lu_xPd_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 Ruderman-Kittel-Kasuya-Yosida interaction strengths fall, as judged by the Sommerfeld coefficient y and Neel temperature T_N. Fits to a crystal-field model of the resistivity also support these conclusions. The paramagnetic effective moment μ_(eff) increases with Lu dilution, indicating a decrease in the Kondo screening. In the highly dilute limit, μ_(eff) 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-neighbor interactions has been developed.
机译：我们介绍了Pu_（1-x）Lu_xPd_3（x = 0、0.1、0.2、0.5、0.8和1）的磁化率，热容和电阻率的测量值。PuPd_3是T_N = 24的反铁磁性重费米子化合物。 K.随着Lu掺杂的增加，根据Sommerfeld系数y和Neel温度T_N判断，近藤和Ruderman-Kittel-Kasuya-Yosida的相互作用强度均下降。拟合电阻率的晶体场模型也支持这些结论。顺磁有效力矩μ_（eff）随Lu稀释而增加，表明近藤筛选降低。在高度稀释的极限下，μ_（eff）接近中间耦合计算所预测的值。结合在约60 K的磁热容量中观察到的肖特基峰（对应于约12 meV的晶体场分裂），建立了具有最近邻相互作用的平均场中间耦合模型。

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  • 来源
    《Physical review》 |2010年第15期|p.155136.1-155136.9|共9页
  • 作者

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

  • 作者单位

    Helmholtz-Zentrum Berlin fuer Materialen und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany;

    Department of Physics and Astronomy, and London Centre for Nanotechnology, University College London,WC1E 6BT, London, United Kingdom;

    lint Research Centre, Institute for Transuranium Elements, European Commission, Postfach 2340, D-76125 Karlsruhe, Germany;

    lint Research Centre, Institute for Transuranium Elements, European Commission, Postfach 2340, D-76125 Karlsruhe, Germany;

    lint Research Centre, Institute for Transuranium Elements, European Commission, Postfach 2340, D-76125 Karlsruhe, Germany;

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  • 关键词

    static properties (order parameter,static susceptibility,heat capacities,critical exponents,etc.); crystal-field theory and spin hamiltonians;

    机译：静态特性（有序参数;静态磁化率;热容量;临界指数等）;晶体场理论和自旋哈密顿量;

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