We report on the magnetic, transport, and thermal properties of the hexagonal ZrNiAl-type compound CeMgIn with Ce atoms forming a distorted kagome network. This compound exhibits successive antiferromagnetic transition at TN1= 2.1 K, TN2= 1.7 K, and possibly TN3= 1.3 K. The electrical resistivity exhibits a minimum at 11 K and a nonlogarithmic increase with decreasing temperature down to TN2. We found that CeMgIn is the first ZrNiAl-type compound whose resistivity increase can be well explained by considering a model in which the electron-spin scattering is enhanced by the magnetic frustration and the Ruderman-Kittel-Kasuya-Yosida interaction. These results suggest that CeMgIn is a notable compound whose physical properties are strongly affected by geometrical frustration. Since the Sommerfeld coefficient is 97 mJ/mol K2, CeMgIn is classified as a moderate heavy-fermion compound.
@article{arxiv.2504.03186,
title = {Successive Antiferromagnetic Transition in the Frustrated Compound CeMgIn},
author = {Kou Onishi and Hitoshi Sugawara and Takahiro Sakurai and Hitoshi Ohta and Eiichi Matsuoka},
journal= {arXiv preprint arXiv:2504.03186},
year = {2025}
}