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MA: Fachverband Magnetismus

MA 23: Cooperative Phenomena: Spin Structures and Magnetic Phase Transitions (joint session MA/TT)

MA 23.4: Vortrag

Dienstag, 10. März 2026, 14:45–15:00, POT/0151

Field-induced transitions in the charge-ordered Kagome metal FeGe — •Lilian Prodan¹, Jeremy Sourd², Pavlo Khanenko², Yurii Skourski², Sergei Zherlitsyn², and István Kézsmárki¹ — ¹EPV, Institute of Physics, University of Augsburg - Augsburg, Germany — ²HLD-EMFL, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany

Kagome metals with strong electronic correlations have recently attracted significant interest as fertile platforms for emergent phenomena such as unconventional magnetism, topological transport, and symmetry-breaking instabilities. Among them, FeGe stands out due to its intriguing combination of noncollinear magnetism and charge ordering, making it a prime candidate for studying the coupling between spin, charge, and lattice degrees of freedom [1]. This compound orders antiferromagnetically below  ∼410 K, develops a charge-density-wave state near ∼110 K, and forms a noncollinear spin structure below  ∼60 K. To explore how these orders interact, we performed magnetization, sound-velocity, and magnetostriction measurements in static and pulsed magnetic fields up to 60 T. Our results reveal previously unreported transitions at high magnetic fields and allow us to construct an extended H-T phase diagram for FeGe. [1] X. Teng, et al., Nature 609, 490-495 (2022).

Keywords: Kagome metals; Charge-density-wave; Noncollinear magnetism; Spin-lattice coupling