Dense Kondo Effect in Caged Compound CeRu₂Zn₂₀

Magnetic and Thermal Properties of SmRh2Zn20 Single Crystal

“…21,22) The crystal structure of the cubic CeCr 2 Al 20 type was confirmed from the X-ray powder diffraction pattern. There was no trace of impurity phases.…”

Investigation of magnetic order inSmTr2Zn20 (Tr=Fe,Yazici1, White2, Ho3 et al. 2014Phys. Rev. B

“…[13][14][15][16][17] These RT r 2 X 20 compounds have recently attracted much attention because of their unique crytal structure, in which R ions are encapsulated in the Frank-Kasper cages formed by 16 X ions, and have a larger coordination number of tetrahedral groupings of spheres, 18 compared to the filled skutterudites and rare-earth hexaborides. [19][20][21][22][23][24][25][26][27][28][29][30] This crystal structure provides an opportunity to study strongly correlated electronic states, which can be associated with either f or d electrons, and localized rare-earth magnetic moments that have a large spatial separation.…”

Isotropic Γ6 Ground State in Caged Cubic Compound NdRu2Zn20

“…1,6) Crystal structure of the cubic CeCr 2 Al 20 type was confirmed by the X-ray powder diffraction pattern. There was no trace of impurity phases.…”

“…For example, CeRu 2 Zn 20 is one of the dense Kondo compounds with an enhanced electronic-specific-heat coefficient. 1) PrRh 2 Zn 20 shows a quadrupolar order at an extremely low temperature. 2 [2][3][4] YbT 2 Zn 20 (T = Fe, Co, Ru, Rh, Os, Ir) are heavy-electron compounds with large local-moment degeneracy.…”

“…The ground state of CEF is doublet Γ 6 ; the wave vector is Ψ(Γ 6 ) = 1 √ 24 (3|± 9 2 + √ 14|± 1 2 +|∓ 7 2 ). The first and the second excited states are quartets Γ (1) 8 and Γ (2) 8 situated at 26.1 K and 70.1 K above the ground state, respectively. The expectation value of Γ 6 |J z |Γ 6 is ±1.833.…”