dorsal/arxiv
View SchemaFrustrated Magnetism in FeGe$_3$O$_4$ with a Chiral Trillium Network
| Authors | Matt Boswell, Mingyu Xu, Haozhe Wang, Mouyang Cheng, N. Li, X. F. Sun, Haidong Zhou, Huibo Cao, Mingda Li, Weiwei Xie |
|---|---|
| Categories | |
| ArXiv ID | 2601.08947vv1 |
| URL | https://arxiv.org/abs/2601.08947 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
The discovery of new magnetic ground states in geometrically frustrated lattices remains a central challenge in materials science. Here, we report the synthesis, structural characterization, and frustrated magnetic properties of FeGe$_3$O$_4$, a newly identified compound that crystallizes in the noncentrosymmetric cubic space group $P2_13$. In this structure, Fe atoms form an intricate double-trillium lattice with nearest-neighbor Fe--Fe distances of $\sim$4.2~\AA{}, while Ge$^{2+}$ ions mediate magnetic interactions through Fe-Ge-Fe pathways. Field-dependent magnetization at 2~K shows a pronounced nonlinearity, reaching a maximum moment of 2.55(3)~$\mu_\mathrm{B}$/Fe$^{2+}$ at 70~kOe without evidence of saturation. Magnetic susceptibility, heat capacity, and neutron scattering collectively reveal the onset of short-range magnetic interactions near 5~K, with no long-range ordering detected down to 0.06~K. Specific heat measurements demonstrate strong frustration: only $\sim$34\% of the expected magnetic entropy is recovered at 2.4~K. Taken together, these results establish FeGe$_3$O$_4$ as a rare example of a geometrically frustrated trillium-lattice magnet, offering a promising platform for exploring exotic quantum magnetic phenomena.
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"abstract": "The discovery of new magnetic ground states in geometrically frustrated lattices remains a central challenge in materials science. Here, we report the synthesis, structural characterization, and frustrated magnetic properties of FeGe$_3$O$_4$, a newly identified compound that crystallizes in the noncentrosymmetric cubic space group $P2_13$. In this structure, Fe atoms form an intricate double-trillium lattice with nearest-neighbor Fe--Fe distances of $\\sim$4.2~\\AA{}, while Ge$^{2+}$ ions mediate magnetic interactions through Fe-Ge-Fe pathways. Field-dependent magnetization at 2~K shows a pronounced nonlinearity, reaching a maximum moment of 2.55(3)~$\\mu_\\mathrm{B}$/Fe$^{2+}$ at 70~kOe without evidence of saturation. Magnetic susceptibility, heat capacity, and neutron scattering collectively reveal the onset of short-range magnetic interactions near 5~K, with no long-range ordering detected down to 0.06~K. Specific heat measurements demonstrate strong frustration: only $\\sim$34\\% of the expected magnetic entropy is recovered at 2.4~K. Taken together, these results establish FeGe$_3$O$_4$ as a rare example of a geometrically frustrated trillium-lattice magnet, offering a promising platform for exploring exotic quantum magnetic phenomena.",
"arxiv_id": "2601.08947",
"authors": [
"Matt Boswell",
"Mingyu Xu",
"Haozhe Wang",
"Mouyang Cheng",
"N. Li",
"X. F. Sun",
"Haidong Zhou",
"Huibo Cao",
"Mingda Li",
"Weiwei Xie"
],
"categories": [
"cond-mat.str-el"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "Frustrated Magnetism in FeGe$_3$O$_4$ with a Chiral Trillium Network",
"url": "https://arxiv.org/abs/2601.08947",
"version": "v1"
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