Year: 2026
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide 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 P 2 1 3. In this structure, Fe atoms form an intricate double-trillium lattice with nearest-neighbor Fe–Fe distances of ∼4.2 Å, 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) μ 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 ∼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.
DOI: 10.1021/jacs.5c22025
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: National Science Foundation, U.S. Department of Energy, Oak Ridge Associated Universities, Massachusetts Institute of Technology, Michigan State University, National Natural Science Foundation of China, Anhui University, Office of Science, Oak Ridge Institute for Science and Education, College of Engineering, Michigan State University, National Key Research and Development Program of China, National Social Science Fund of China, Division of Materials Research, Basic Energy Sciences, Workforce Development for Teachers and Scientists, Oak Ridge National Laboratory
Awards: G1260032182, G1286284911, TRACING THE TOPOLOGICAL FINGERPRINT OF WEYL SEMIMETALS USING NEUTRON PROBES, G1369588039, G1538770391, G17040919, G2343674527, G2474770916, Radionuclide Immobilization in Reducing Cementitious Materials, G2917895714, G3150609068, G3266441112, G3691352189, G473123490, G473396326, G50338517, G5344189909, G601061201, G6017181652, G651231851, G6744452549, G681520083, G705289398, TRACING THE TOPOLOGICAL FINGERPRINT OF WEYL SEMIMETALS USING NEUTRON PROBES, G7265982839, G7619220232, G8570346810, Manipulating the strong quantum spin fluctuations in triple perovskites with effective spin-1/2 triangular lattice
OpenAlex ID: W7128721637