Abstract
The Ce atoms in CeIrSn form a quasikagome lattice in the hexagonal plane. Our single-crystal x-ray diffraction analysis has confirmed the absence of superstructure in the ZrNiAl-type structure. Motivated by the recent observation of quantum critical behaviors in the isostructural and isoelectronic compound CeRhSn, we have studied low-temperature properties of single-crystalline samples of CeIrSn by measuring the electrical resistivity, magnetic susceptibility , magnetization , and specific heat down to 0.05 K. Our study does not show evidence of a long-range magnetic ordering down to the lowest temperature. The data show an Ising character, , and power-law behaviors at low temperatures: and . When external field is applied along the axis, both and exhibit metamagnetic anomalies at 5.5 T, which resemble those observed in CeRhSn at 3.5 T. We attribute the metamagnetic crossover under in-plane magnetic fields to the alleviation of magnetic frustration inherent in the quasikagome Ising Kondo lattice.
- Received 22 June 2018
DOI:https://doi.org/10.1103/PhysRevB.98.155147
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