Magnetism and fermiology of kagome magnet YMn6Sn4Ge2

• Published in: npj quantum materials Vol. 9; no. 1; pp. 6 - 10
• Main Authors: Bhandari, Hari, Dally, Rebecca L., Siegfried, Peter E., Regmi, Resham B., Rule, Kirrily C., Chi, Songxue, Lynn, Jeffrey W., Mazin, I. I., Ghimire, Nirmal J.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 08.01.2024; Nature Publishing Group; Nature Portfolio
• Subjects: 639/766/119/1001; 639/766/119/997; Condensed Matter Physics; Crystal structure; Electronic properties; Fermi surfaces; Germanium; Influence; Kagome lattice; Magnetic fields; Magnetic properties; Magnetic structure; Magnetism; Magnets; MATERIALS SCIENCE; Neutron diffraction; Neutrons; Physics; Physics and Astronomy; Quantum Physics; Rare earth elements; Sensitivity; Structural Materials; Substitutes; Surfaces and Interfaces; Thin Films; Tin; Topology
• ISSN: 2397-4648; 2397-4648
• DOI: 10.1038/s41535-023-00616-0

Kagome lattice magnets are an interesting class of materials as they can host topological properties in their magnetic and electronic structures. YMn 6 Sn 6 is one such compound in which various exotic magnetic and electronic topological properties have been realized. Here, by means of a partial substitution of Sn with an isovalent and slightly smaller atom Ge, we demonstrate the sensitivity of such chemical substitution on the magnetic structure and its influence in the electronic properties. Magnetic structure of YMn 6 Sn 4 Ge 2 determined by neutron diffraction reveals an incommensurate staggered magnetic spiral with a slightly larger spiral pitch than in YMn 6 Sn 6 . This change in magnetic structure influences the Fermi surface enhancing the out-of-plane conductivity. Such a sensitivity to the partial chemical substitution provides a great potential for engineering the magnetic phases and associated electronic properties not only in YMn 6 Sn 6 , but also in the large family of 166 rare-earth kagome magnet.