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Destruction of Kondo coherence in heavy fermion system Eu(Ni_(1-x)Cu_x)_2P2 (0.00 ≤ x≤ 0.20)

机译:重型系统Eu(Ni_(1-x)Cu_x)_2p2(0.00≤x≤0.20)破坏Kondo相干性的破坏

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Polycrystalline samples of Eu(Ni_(1-x)Cux)_2P_2 (x= 0.00, 0.05, 0.10, 0.15 and 0.20) were investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM), electrical resistivity p(T) and magnetic susceptibility X(T) measurements. XRD and SEM results confirm essentially single phase nature of the samples. The substitution of Ni by Cu atoms leads to dramatic change in the behavior of p(T) of EuNi_2P_2 where Kondo coherence is destroyed even for x =0.05. A minima in the p(T) has been observed for all doping concentrations. This behavior has been discussed in terms of Kondo effect.
机译:通过X射线衍射(XRD),扫描电子显微镜(SEM),电阻率P(X2P_2(X2P_2(X = 0.00,0.05,0.10,0.15和0.05,0.10,0.15和0.20),电阻率P(SEM)。 )和磁化率X(t)测量。 XRD和SEM结果基本上确认样品的单相性质。 Cu原子取代Ni的取代导致EUNI_2P_2的P(T)的行为的显着变化,其中kondo相干性也被破坏x = 0.05。已经观察到P(t)中的最小值,用于所有掺杂浓度。这种行为已经在Kondo效应方面讨论过。

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