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Observation of quantum criticality in antiferromagnetic based (Ce1−xYx)2Ir3Ge5 Kondo-Lattice system
Ist Teil von
Journal of magnetism and magnetic materials, 2022-08, Vol.556, p.169361, Article 169361
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
2022
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
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•The chemical substitution dependencies of the three power law parameters have very similar behavior.•The minimum n exponent, maximum A coefficient, and ρo residual resistivity are at the same critical concentration xcr, expecting the sign for QCP in a non-Fermi Liquid (nFL) region.•Above xcr, the A values drop abruptly and the n values increase only slightly, indicating a transition from strongly to weakly correlated regime near the critical concentration xcr.
We have carried out a detailed study of the (Ce1−xYx)2Ir3Ge5 anti-ferromagnetic compounds across the entire range of substitution 0 ≤ x ≤ 0.33 and report the results of powder X-ray diffraction, magnetic susceptibility, heat capacity, and electrical resistivity measurements to exhibit the anti-ferromagnetic phase temperature (TN) versus substitution x phase diagram. The pure Ce2Ir3Ge5 system indicates anti-ferromagnetic behavior below TN = 9.5 K. Substitution of Y into (Ce1−xYx)2Ir3Ge5 compound leads to a decrease in the anti-ferromagnetic phase temperature (TN). Near x = 0.3, the anti-ferromagnetic transition temperature is suppressed to zero kelvin at an apparent anti-ferromagnetic quantum critical point, without the superconductivity sign, where the temperature dependence of the heat capacity and electrical resistivity in this region reveal non-Fermi Liquid behavior. The above results, for example, the suppressing of TN, maybe a new way to find low-temperature superconductivity in these compounds.