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MA: Fachverband Magnetismus
MA 30: Bulk Materials: Soft and Hard Permanent Magnets
MA 30.6: Vortrag
Mittwoch, 19. März 2025, 17:30–17:45, H18
Peculiar low-temperature properties in the ferromagnetic pyrochlore metal LuInCo4 — •Taiki Shiotani1, Hiroyuki Nakamura1, and István Kézsmárki2 — 1Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan — 2Experimental Physics V, Institute of Physics, University of Augsburg, D-86159, Augsburg, Germany
The pyrochlore lattice, a network of corner-sharing tetrahedra, is attracting attention due to geometrical frustration as well as nontrivial topology of the band structure. LuInCo4 is C15b-type laves phase compound with a Co-based pyrochlore sublattice. We have successfully synthesized single crystals of LuInCo4 and found strong ferromagnetism with the TC=306 K [1]. The ferromagnetic nature was reproduced by density functional theory calculations, suggesting that Co-3d flat bands near the fermi level induce the spin polarization. The magnetization has no detectable anisotropy down to ≈100 K, below which the anisotropy gradually becomes stronger with the cubic 100-type axes being the easy-axes. For fields applied along the cubic 111-type directions the material goes through a metamagnetic transition.
Here, we will focus on the low-temperature phase of LuInCo4 to discuss the origin of the anomalous behavior of the magnetization.
[1] T. Shiotani et al., Phys. Rev. Mater. 8, 114409 (2024)
Keywords: pyrochlore lattice; itinerant electron ferromagnet; metamagnetic transition; magnetic anisotropy