Successive Antiferromagnetic Transition in the Frustrated Compound CeMgIn
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| author | Onishi, Kou Sugawara, Hitoshi Sakurai, Takahiro Ohta, Hitoshi Matsuoka, Eiichi |
| author_facet | Onishi, Kou Sugawara, Hitoshi Sakurai, Takahiro Ohta, Hitoshi Matsuoka, Eiichi |
| contents | 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 $T_\text{N1} =$ 2.1 K, $T_\text{N2} =$ 1.7 K, and possibly $T_\text{N3} =$ 1.3 K. The electrical resistivity exhibits a minimum at 11 K and a nonlogarithmic increase with decreasing temperature down to $T_\text{N2}$. 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 K$^2$, CeMgIn is classified as a moderate heavy-fermion compound. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_03186 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Successive Antiferromagnetic Transition in the Frustrated Compound CeMgIn Onishi, Kou Sugawara, Hitoshi Sakurai, Takahiro Ohta, Hitoshi Matsuoka, Eiichi Strongly Correlated Electrons 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 $T_\text{N1} =$ 2.1 K, $T_\text{N2} =$ 1.7 K, and possibly $T_\text{N3} =$ 1.3 K. The electrical resistivity exhibits a minimum at 11 K and a nonlogarithmic increase with decreasing temperature down to $T_\text{N2}$. 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 K$^2$, CeMgIn is classified as a moderate heavy-fermion compound. |
| title | Successive Antiferromagnetic Transition in the Frustrated Compound CeMgIn |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2504.03186 |