Magnetic properties of Gd_xY_{1-x}Fe_2Zn_{20}: dilute, large, $\text{S}$ moments in a nearly ferromagnetic Fermi liquid

Abstract

Single crystals of the dilute, rare earth bearing, pseudo-ternary series, Gd_xY_{1-x}Fe_2Zn_{20} were grown out of Zn-rich solution. Measurements of magnetization, resistivity and heat capacity on Gd_xY_{1-x}Fe_2Zn_{20} samples reveal ferromagnetic order of Gd^{3+} local moments across virtually the whole series ($x\ge 0.02$). The magnetic properties of this series, including the ferromagnetic ordering, the reduced saturated moments at base temperature, the deviation of the susceptibilities from Curie-Weiss law and the anomalies in the resistivity, are understood within the frame work of dilute, $\text{S}$ moments (Gd^{3+}) embedded in a nearly ferromagnetic Fermi liquid (YFe_2Zn_{20}). The s-d model is employed to further explain the variation of $T_{\mathrm{C}}$ with x as well as the temperature dependences of of the susceptibilities.

References in corpus (3)

• YSix closely related YbT${}_2$Zn${}_{20}$ (T = Fe, Co, Ru, Rh, Os, Ir) heavy fermion compounds with large local moment degeneracy
• Disorder-Induced Resistive Anomaly Near Ferromagnetic Phase Transitions
• Singular Effects of Impurities near the Ferromagnetic Quantum-Critical Point

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• Multiband electronic characterization of the complex intermetallic cage system Y${}_{1-x}$Gd${}_x$Co${}_2$Zn${}_{20}$
• Enhancement of Curie temperature due to the coupling between Fe itinerant electrons and Dy localized electrons in DyFe2Zn20
• Search for Pressure Induced Quantum Criticality in YbFe2Zn20
• Tuning the electronic hybridization in the heavy fermion cage compound YbFe${}_2$Zn${}_{20}$ with Cd-doping
• Study of 57Fe Mossbauer effect in RFe2Zn20 ( R = Lu, Yb, Gd)
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• Structural Trends and Itinerant Magnetism of the New Cage-structured Compound HfMn${}_2$Zn${}_{20}$
• Comment on "Unconventional enhancement of ferromagnetic interactions in Cd-doped GdFe2Zn20 single crystals studied by ESR and 57Fe Mossbauer spectroscopies"