Lattice Parameter Governs Magnetic Ground State Selection in Tsai-Type Intermetallic Compounds.
13 affiliations
- 1Research Institute for Science and Technology, Tokyo University of Science, Tokyo125-8585, Japan.
- 2Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai980-8577, Japan.
- 3Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka590-0494, Japan.
- 4FOREST, Japan Science and Technology Agency, Kawaguchi, Saitama332-0012, Japan.
- 5Division of Applied Physics, Faculty of Engineering, Hokkaido University, Sapporo060-8628, Japan.
- 6Institute for Materials Research, Tohoku University, Sendai980-8577, Japan.
- 7Department of Physics, Graduate School of Science, Nagoya University, Nagoya464-8602, Japan.
- 8Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki319-1106, Japan.
- 9School of Engineering, Institute of Engineering Innovation, The University of Tokyo, Tokyo113-8656, Japan.
- 10Materials and Life Science Division, J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki319-1195, Japan.
- 11Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba305-0801, Japan.
- 12Institute for Solid State Physics, The University of Tokyo, Kashiwa277-8581, Japan.
- 13Department of Materials Science and Technology, Tokyo University of Science, Tokyo125-8585, Japan.
Abstract
Identifying the key parameters that govern magnetic ground states in complex intermetallics remains a central challenge in materials chemistry. Although the valence-electron concentration (e/a) has frequently been used to classify magnetism in Tsai-type approximant crystals, its predictive power is limited across different alloy families and constituent elements. Here, we demonstrate that the lattice parameter serves as a unified structural parameter governing magnetic ground state selection in Tsai-type icosahedral compounds. Within the framework presented in this work, magnetic ground states collapse onto a single phase diagram that is independent of alloy family and rare-earth species: antiferromagnetic order emerges above a critical lattice parameter of ∼14.72 Å, whereas ferromagnetic order is stabilized within the intermediate range 14.62 Å ≲ a ≲ 14.72 Å. These results indicate that the lattice parameter serves as an experimentally accessible structural parameter that encodes the electronic information traditionally represented by e/a and thereby provides a unified description of magnetic ground state selection. The trends revealed in the present work provide a useful guideline for identifying compositions that may stabilize previously unexplored magnetic phases, including antiferromagnetic quasicrystals and hedgehog-like magnetic textures.
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BibTeX
@article{labib2026lattice,
title = {{Lattice Parameter Governs Magnetic Ground State Selection in Tsai-Type Intermetallic Compounds.}},
author = {Farid Labib and Kazuhiro Nawa and Yusuke Nambu and Hiroyuki Takakura and Yoichi Ikeda and Kazuhiko Deguchi and Masato Matsuura and Asuka Ishikawa and Ryoichi Kajimoto and Kazuhiko Ikeuchi and Taku J Sato and Ryuji Tamura},
journal = {Journal of the American Chemical Society},
year = {2026},
month = oct,
doi = {10.1021/jacs.6c05709},
url = {https://europepmc.org/article/MED/42912268},
note = {CC BY},
}
RIS
TY - JOUR
TI - Lattice Parameter Governs Magnetic Ground State Selection in Tsai-Type Intermetallic Compounds.
AU - Farid Labib
AU - Kazuhiro Nawa
AU - Yusuke Nambu
AU - Hiroyuki Takakura
AU - Yoichi Ikeda
AU - Kazuhiko Deguchi
AU - Masato Matsuura
AU - Asuka Ishikawa
AU - Ryoichi Kajimoto
AU - Kazuhiko Ikeuchi
AU - Taku J Sato
AU - Ryuji Tamura
PY - 2026
DA - 2026/10/01
JO - Journal of the American Chemical Society
DO - 10.1021/jacs.6c05709
UR - https://europepmc.org/article/MED/42912268
AB - Identifying the key parameters that govern magnetic ground states in complex intermetallics remains a central challenge in materials chemistry. Although the valence-electron concentration (e/a) has frequently been used to classify magnetism in Tsai-type approximant crystals, its predictive power is limited across different alloy families and constituent elements. Here, we demonstrate that the lattice parameter serves as a unified structural parameter governing magnetic ground state selection in Tsai-type icosahedral compounds. Within the framework presented in this work, magnetic ground states collapse onto a single phase diagram that is independent of alloy family and rare-earth species: antiferromagnetic order emerges above a critical lattice parameter of ∼14.72 Å, whereas ferromagnetic order is stabilized within the intermediate range 14.62 Å ≲ a ≲ 14.72 Å. These results indicate that the lattice parameter serves as an experimentally accessible structural parameter that encodes the electronic information traditionally represented by e/a and thereby provides a unified description of magnetic ground state selection. The trends revealed in the present work provide a useful guideline for identifying compositions that may stabilize previously unexplored magnetic phases, including antiferromagnetic quasicrystals and hedgehog-like magnetic textures.
SN - 0002-7863
SN - 1520-5126
ER -