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MA: Fachverband Magnetismus

MA 37: Non-Skyrmionic Magnetic Textures

MA 37.9: Vortrag

Mittwoch, 11. März 2026, 17:00–17:15, POT/0351

Microscale coexistence of magnetic phases compatible with the Kagome spin-ice rule in HoAgGe — •Manuel Zahn^1,2, Kan Zhao³, Philipp Gegenwart¹, Sándor Bordács⁴, and István Kézsmárki¹ — ¹Center for Electronic Correlation and Magnetism, University of Augsburg, Augsburg, Germany — ²Norwegian University of Science and Technology, Trondheim, Norway — ³School of Physics, Beihang University, Beijing, China — ⁴Department of Physics, Budapest University of Technology and Economics, Budapest, Hungary

HoAgGe realizes kagome spin-ice with a series of fractionalized magnetization plateau states for applied in-plane magnetic fields [1]. Corresponding magnetoresistance and Hall effect reveal a hysteresis at the plateau states, indicating field-history dependent occupation of magnetic domains with opposite chirality and Berry curvature [2].

In the presented study, we investigate the microscale magnetic patterns, using low-temperature atomic force microscopy to visualize possible phase coexistence. By studying different crystal cuts and varying magnetic fields using a vector magnet, we reconstruct the full 3D magnetic texture of phase coexistence. Our results provide insights into the interplay of geometrical, topological and frustrated properties of spin ice materials and demonstrate pathways for external manipulation of magnetic textures in highly-frustrated systems.

[1] K. Zhao et al., Science 367, 1218 (2020). [2] K. Zhao et al., Nat. Phys. 20, 442 (2024).

Keywords: frustration; phase coexistance; microscale texture