Journal article
Evolution of electronic and magnetic properties in Mn- and Co-alloyed ferromagnetic kagome metal Fe3Sn2
APL materials, v 14(1), 011114
23 Jan 2026
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Abstract
Kagome metals are an intriguing class of quantum materials as the presence of both flat bands and Dirac points provides access to functional properties present in strongly correlated and topological materials. To fully harness these electronic features, the ability to tune the Fermi level relative to the band positions is needed. Here, we explore the structural, electronic, and magnetic impacts of substitutional alloying within ferromagnetic kagome metal Fe3Sn2 in thin films grown by molecular beam epitaxy. Transition metals, Mn and Co, are chosen as substitutes for Fe to reduce or increase the d-band electron count, thereby moving the Fermi level accordingly. We find that Co is not incorporated into the Fe3Sn2 structure but instead results in a two-phase Fe–Co and (Fe,Co)Sn composite. In contrast, Fe3−xMnxSn2 films are realized with x of up to 1.0, retaining crystalline quality comparable with the parent phase. The incorporation of Mn repositions the flat bands relative to the Fermi level in a manner consistent with hole-doping, as revealed by hard x-ray photoemission and density functional theory. The Fe3−xMnxSn2 films retain room temperature ferromagnetism, with x-ray magnetic circular dichroism measurements confirming that the Fe and Mn moments are ferromagnetically aligned. The ability to hole-dope this magnetic kagome metal provides a platform for tuning properties, such as anomalous Hall and Nernst responses.
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Details
- Title
- Evolution of electronic and magnetic properties in Mn- and Co-alloyed ferromagnetic kagome metal Fe3Sn2
- Creators
- Prajwal M. Laxmeesha - Drexel UniversityRajesh Dutta - Drexel UniversityRajeev Kumar Rai - University of PennsylvaniaSharup Sheikh - Temple UniversityMichael F. DiScala - Brown UniversityUditha M. Jayathilake - Temple UniversityAlexander Velič - Drexel UniversityTarush Tandon - Drexel UniversityTessa D. Tucker - Drexel UniversityChristoph Klewe - Lawrence Berkeley National LaboratoryHaile Ambaye - Oak Ridge National LaboratoryTimothy Charlton - Oak Ridge National LaboratoryTien-Lin Lee - Diamond Light SourceEric A. Stach - University of PennsylvaniaKemp W. Plumb - Brown UniversityAlexander X. Gray - Temple UniversitySteven J. May (Corresponding Author) - Drexel University
- Publication Details
- APL materials, v 14(1), 011114
- Publisher
- AIP Publishing
- Number of pages
- 10
- Grant note
- 2429695; NNCI-2025608; DMR-2309043 / National Science Foundation (https://doi.org/10.13039/100000001) DE-SC0024204; DE-SC0024132 / U.S. Department of Energy (https://doi.org/10.13039/100000015)
- Resource Type
- Journal article
- Academic Unit
- Materials Science and Engineering
- Other Identifier
- 991022155318604721