Planar topological Hall effect in a uniaxial van der Waals ferromagnet Fe3GeTe2

Abstract

In this work, we reported the observation of a novel planar topological Hall effect (PTHE) in single crystal of Fe3GeTe2, a paradigmatic two-dimensional ferromagnet with strong uniaxial anisotropy. The Hall effect and magnetoresistance varied periodically when the external magnetic field rotated in the ac (or bc) plane, while the PTHE emerged and maintained robust with field swept across the hard-magnetized ab plane. The PTHE covers the whole temperature region below Tc (~150 K) and a comparatively large value is observed at 100 K. Emergence of an internal gauge field was proposed to explain the origin of this large PTHE, which is either generated by the possible topological domain structure of uniaxial Fe3GeTe2 or the non-coplanar spin structure formed during the in-plane magnetization. Our results promisingly provide an alternative detection method to the in-plane skyrmion formation and may bring brand-new prospective to magneto-transport studies in condensed matter physics.

arXiv comment15 pages, 4 figures

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• Large-scale epitaxy of two-dimensional van der Waals room-temperature ferromagnet Fe5GeTe2
• Magnetotransport as diagnostic of spin reorientation: kagome ferromagnet as a case study
• Elusive Dzyaloshinskii-Moriya interaction in Fe${}_3$GeTe${}_2$ monolayer
• Neutron spectroscopy evidence on the dual nature of magnetic excitations in a van der Waals metallic ferromagnet Fe${}_{2.72}$GeTe${}_2$
• Observation of Planar Hall Effect in Topological Insulator -- Bi${}_2$Te${}_3$
• Effects of Fe deficiency and Co substitution in polycrystalline and single crystals of Fe${}_3$GeTe${}_2$
• Anomalous resistivity upturn in the van der Waals ferromagnet Fe${}_5$GeTe${}_2$
• Interlayer magnetism in Fe3-xGeTe2
• Planar Topological Hall Effect from Conical Spin Spirals
• Sign-reversed anomalous Nernst effect in the ferromagnetic Weyl-semimetal Fe${}_{3-x}$GeTe${}_2$: the role of Fe vacancies
• Fluctuation-driven topological Hall effect in room-temperature itinerant helimagnet Fe3Ga4
• Josephson spin-valve realization in the magnetic nodal-line topological semimetal Fe${}_3$GeTe${}_2$
• Modification of unconventional Hall effect with doping at the non-magnetic site in a 2D van der Waals ferromagnet
• Epitaxial growth of bilayer Bi(110) on two-dimensional ferromagnetic Fe3GeTe2
• Spin-polarized supercurrent through the van der Waals Kondo lattice ferromagnet Fe${}_3$GeTe${}_2$
• Second-harmonic response as a tool to detect spin textures in magnetic nodal-line semimetal Fe${}_3$GeTe${}_2$
• Planar topological Hall effect in a hexagonal ferromagnetic Fe5Sn3 single crystal
• Observation of the In-plane Anomalous Hall Effect induced by Octupole in Magnetization Space
• Spin-reorientation driven topological Hall effect in Fe4GeTe2
• Direct evidence from high-field magnetotransport for a dramatic change of quasiparticle character in van der Waals ferromagnet Fe${}_{3-x}$GeTe${}_2$
• Cusplike feature in Hall resistivity of a uniaxial ferromagnet in nonorthogonal Hall geometry
• Quenching the Non-Collinear Spin Order in High-Tc Layered Ferromagnet Fe5GeTe2
• Unconventional Hall effect and its variation with Co-doping in van der Waals Fe3GeTe2