Interlayer ferromagnetic order revealed through pressure-enhanced interlayer exchange coupling in Fe3GaTe2
Abstract
Van der Waals ferromagnets possess finite interlayer magnetic coupling despite their layered crystal structures, and this coupling plays an important role in determining their magnetic properties. In this study, we performed magnetization measurements on high-quality Fe3GaTe2 single crystals while selectively tuning the interlayer coupling using hydrostatic pressure. We identified two characteristic temperatures, Tinf1 and Tinf2, below the Curie temperature with opposite pressure dependences: Tinf1 is associated with thermally activated domain-wall depinning, whereas Tinf2 reflects the formation of interlayer ferromagnetic order. Both temperatures exhibit pronounced pressure dependences, in sharp contrast to the nearly pressure-independent Curie temperature associated with intralayer ferromagnetic order. First-principles calculations revealed a substantial pressure-induced enhancement of the interlayer exchange interaction and reasonably reproduced Tinf2 and its pressure dependence. These results demonstrate that the emergence of interlayer magnetic ordering can be predicted from the microscopic interlayer exchange coupling, establishing a predictive framework for understanding and designing interlayer coupling phenomena in layered magnetic materials.
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BibTeX
@misc{iimori2026interlayer,
title = {{Interlayer ferromagnetic order revealed through pressure-enhanced interlayer exchange coupling in Fe$_3$GaTe$_2$}},
author = {Riku Iimori and Takashi Kimura},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.11731},
eprint = {2610.11731},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.11731},
}
RIS
TY - UNPB
TI - Interlayer ferromagnetic order revealed through pressure-enhanced interlayer exchange coupling in Fe_3GaTe_2
AU - Riku Iimori
AU - Takashi Kimura
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2610.11731
UR - https://arxiv.org/abs/2610.11731
AB - Van der Waals ferromagnets possess finite interlayer magnetic coupling despite their layered crystal structures, and this coupling plays an important role in determining their magnetic properties. In this study, we performed magnetization measurements on high-quality Fe_3GaTe_2 single crystals while selectively tuning the interlayer coupling using hydrostatic pressure. We identified two characteristic temperatures, T_inf1 and T_inf2, below the Curie temperature with opposite pressure dependences: T_inf1 is associated with thermally activated domain-wall depinning, whereas T_inf2 reflects the formation of interlayer ferromagnetic order. Both temperatures exhibit pronounced pressure dependences, in sharp contrast to the nearly pressure-independent Curie temperature associated with intralayer ferromagnetic order. First-principles calculations revealed a substantial pressure-induced enhancement of the interlayer exchange interaction and reasonably reproduced T_inf2 and its pressure dependence. These results demonstrate that the emergence of interlayer magnetic ordering can be predicted from the microscopic interlayer exchange coupling, establishing a predictive framework for understanding and designing interlayer coupling phenomena in layered magnetic materials.
ER -