2026-10-07T01:00:34Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34029967 2026-09-30T05:16:35Z category_7 category_24 category_272 category_105 portal_63 item_type_6 month_year_09_2026

Lattice Parameter Governs Magnetic Ground State Selection in Tsai-Type Intermetallic Compounds Farid Labib (22072826) Kazuhiro Nawa (1593346) Yusuke Nambu (8877593) Hiroyuki Takakura (2718982) Yoichi Ikeda (58873) Kazuhiko Deguchi (18589555) Masato Matsuura (3043017) Asuka Ishikawa (11423782) Ryoichi Kajimoto (20419192) Kazuhiko Ikeuchi (9234268) Taku J. Sato (11715428) Ryuji Tamura (11715416) Medicine Evolutionary Biology Environmental Sciences not elsewhere classified Statistics whereas ferromagnetic order type icosahedral compounds type approximant crystals single phase diagram like magnetic textures lattice parameter serves including antiferromagnetic quasicrystals electron concentration (< critical lattice parameter complex intermetallics remains antiferromagnetic order emerges intermediate range 14 present work provide 62 å ≲ ≲ 14 ∼ 14 72 å useful guideline unified description trends revealed thereby provides results indicate predictive power materials chemistry key parameters identifying compositions framework presented earth species constituent elements classify magnetism central challenge alloy family Identifying the key parameters that govern magnetic ground states in complex intermetallics remains a central challenge in materials chemistry. Although the valence-electron concentration (<i>e</i>/<i>a</i>) 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 ≲ <i>a</i> ≲ 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 <i>e</i>/<i>a</i> 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. 2026-09-30T00:00:00Z Text Journal contribution 10.1021/jacs.6c05709.s001 https://figshare.com/articles/journal_contribution/Lattice_Parameter_Governs_Magnetic_Ground_State_Selection_in_Tsai-Type_Intermetallic_Compounds/34029967 CC BY-NC 4.0