【摘 要】
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The heavy fermion ferromagnet CeRh6Ge4 is the first example of a clean stoichiometric system where the fer-romagnetic transition can be continuously suppressed
【机 构】
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Center for Correlated Matter and Department of Physics,Zhejiang University,Hangzhou 310058,China;Cen
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The heavy fermion ferromagnet CeRh6Ge4 is the first example of a clean stoichiometric system where the fer-romagnetic transition can be continuously suppressed by hydrostatic pressure to a quantum critical point.In order to reveal the outcome when the magnetic lattice of CeRh6Ge4 is diluted with non-magnetic atoms,this study reports comprehensive measurements of the physical properties of both single crystal and polycrystalline samples of LaxCe1-xRh6Ge4.With increasing x,the Curie temperature decreases,and no transition is observed for x＞0.25,while the system evolves from exhibiting coherent Kondo lattice behaviors at low x to the Kondo impurity scenario at large x.Moreover,non-Fermi liquid behavior is observed over a wide doping range,which agrees well with the disordered Kondo model for 0.52≤x≤0.66,while strange metal behavior is revealed in the vicinity of xc=0.26.
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