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DOE OSTI · 2587279

Zr 3 Mn 3 Sn 4 Ga: A new hetero-kagome bilayer antiferromagnet

Park, Jaemun [Daegu Gyeongbuk Institute of Science and Technology (DGIST) (Korea, Republic of)] (ORCID:0000000228183561)·Cho, Beopgil [Daegu Gyeongbuk Institute of Science and Technology (DGIST) (Korea, Republic of)]·Oh, Ji Seop [Sookmyung Women's University, Seoul (Korea, Republic of)]·Lee, Jungmin [Korea Atomic Energy Research Institute (KAERI), Daejeon (Korea, Republic of)]·Rhee, Taeseong [Daegu Gyeongbuk Institute of Science and Technology (DGIST) (Korea, Republic of)]·Lu, Donghui [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)]·Hashimoto, Makoto [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)] (ORCID:0000000316898997)·Kim, Jaewook [Korea Atomic Energy Research Institute (KAERI), Daejeon (Korea, Republic of)] (ORCID:0000000254325711)·Park, Keeseong [Daegu Gyeongbuk Institute of Science and Technology (DGIST) (Korea, Republic of)] (ORCID:0000000225390135)
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Abstract

Here, we report the magnetic and electrical transport properties of single-crystalline Zr 3 Mn 3 Sn 4 Ga, featuring two distinct kagome lattices: a non-magnetic breathing Zr 3 Sn 4 lattice and a magnetic intact Mn 3 Ga lattice. The material undergoes an antiferromagnetic phase transition at T N = 87 K, with neutron diffraction confirming commensurate ordering characterized by k = (1/3,1/3,0). Transport measurements show metallic behavior, a resistivity anomaly near T N , and 12% magnetoresistance at 2 K under 9 T. Deviations from the conventional second-order power law, along with negative magnetoresistance and nonlinear Hall slope variations near T N , suggest strong magneto-electronic coupling. Resonant photoemission spectroscopy identifies Zr 4d and Mn 3d orbitals as dominant contributors to the valence band, linking the material’s unique electronic properties to its kagome layers. Zr 3 Mn 3 Sn 4 Ga offers a valuable platform to study interactions between magnetism and topological electronic bands in hetero-kagome systems using the co- existence of magnetic and non-magnetic kagome layers and its tunable electronic structure.

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Park, Jaemun [Daegu Gyeongbuk Institute of Science and Technology (DGIST) (Korea, Republic of)] (ORCID:0000000228183561), Cho, Beopgil [Daegu Gyeongbuk Institute of Science and Technology (DGIST) (Korea, Republic of)], Oh, Ji Seop [Sookmyung Women's University, Seoul (Korea, Republic of)], Lee, Jungmin [Korea Atomic Energy Research Institute (KAERI), Daejeon (Korea, Republic of)], Rhee, Taeseong [Daegu Gyeongbuk Institute of Science and Technology (DGIST) (Korea, Republic of)], Lu, Donghui [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)], Hashimoto, Makoto [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)] (ORCID:0000000316898997), Kim, Jaewook [Korea Atomic Energy Research Institute (KAERI), Daejeon (Korea, Republic of)] (ORCID:0000000254325711), Park, Keeseong [Daegu Gyeongbuk Institute of Science and Technology (DGIST) (Korea, Republic of)] (ORCID:0000000225390135). 2025-04-16. Zr 3 Mn 3 Sn 4 Ga: A new hetero-kagome bilayer antiferromagnet. https://doi.org/10.1016/j.scriptamat.2025.116701

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