Crystalline electric field of Ce in trigonal symmetry: CeIr3Ge7 as a model case

Abstract

The crystalline electric field (CEF) of Ce3+ in trigonal symmetry has recently become of some relevance, for instance, in the search of frustrated magnetic systems. Fortunately, it is one of the CEF case in which a manageable analytic solution can be obtained. Here, we present this solution for the general case, and use this result to determine the CEF scheme of the new compound CeIr3Ge7 with the help of T-dependent susceptibility and isothermal magnetization measurements. The resulting CEF parameters B20 = 34.4 K, B40 = 0.82 K and B43 = 67.3 K correspond to an exceptional large CEF splittings of the first and second excited levels, 374 K and 1398 K, and a large mixing between the +-|5/2> and the -+|1/2> states. This indicates a very strong easy plane anisotropy with an unusual small c-axis moment. Using the same general expressions, we show that the properties of the recently reported system CeCd3As3 can also be described by a similar CEF scheme, providing a much simpler explanation for its magnetic properties than the initial proposal. Moreover, a similar strong easy plane anisotropy has also been reported for the two compounds CeAuSn and CePdAl4Ge2, indicating that the CEF scheme elaborated here for CeIr3Ge7 corresponds to an exemplary case for Ce3+ in trigonal symmetry.

10 pages, 7 figures

References in corpus (6)

• Metallic Quantum Ferromagnets
• Candidate Quantum Spin Liquid in the Ce\textsuperscript{3+} Pyrochlore Stannate Ce${}_2$Sn${}_2$O${}_7$
• Entropy evolution in the magnetic phases of partially frustrated CePdAl
• Large positive correlation between the effective electron mass and the multipolar fluctuation in the heavy-fermion metal Ce${}_{1-x}$La${}_x$B${}_6$
• CeIr${}_3$Ge${}_7$: a local moment antiferromagnetic metal with extremely low ordering temperature
• Revealing a Triangular Lattice Ising Antiferromagnet in a Single-Crystal CeCd${}_3$As${}_3$

Cited by in corpus (16)

• Spin liquids in geometrically perfect triangular antiferromagnets
• The two-dimensional metallic triangular lattice antiferromagnet CeCd3P3
• Long-range magnetic order in the $\tilde{S}=1/2$ triangular lattice antiferromagnet KCeS${}_2$
• Triangular Kondo lattice in $\mathrm{Yb}{\mathrm{V}}_6\mathrm{S}{\mathrm{n}}_6$ and its quantum critical behaviors in magnetic field
• Systematic extraction of crystal electric-field effects and quantum magnetic model parameters in triangular rare-earth magnets
• Magnetic frustration in a van der Waals metal CeSiI
• Magnetic, thermodynamic, and magnetotransport properties of CeGaGe and PrGaGe single crystals
• Fingerprinting Triangular-Lattice Antiferromagnet by Excitation Gaps
• Long-range magnetic order in the anisotropic triangular lattice system CeCd3As3
• CeIr${}_3$Ge${}_7$: a local moment antiferromagnetic metal with extremely low ordering temperature
• Ferromagnetic ordering along the hard axis in the Kondo lattice YbIr3Ge7
• The influence of crystalline electric field on the magnetic properties of CeCd3X3 (X = P and As)
• Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution
• Observation of quantum oscillations, linear magnetoresistance, and crystalline electric field effect in quasi-two-dimensional PrAgBi${}_2$
• Importance of anisotropic interactions for hard-axis/plane ordering of Ce-based ferromagnets
• Easy-plane ferromagnetic ordering and crystal-field ground state in the Kondo lattice CeCuSi