Antisymmetric magnetoresistance in van der Waals Fe3GeTe2/graphite/Fe3GeTe2 tri-layer heterostructures

Abstract

Van der Waals (vdW) ferromagnetic materials are rapidly establishing themselves as effective building blocks for next generation spintronic devices. When layered with non-magnetic vdW materials, such as graphene and/or topological insulators, vdW heterostructures can be assembled (with no requirement for lattice matching) to provide otherwise unattainable device structures and functionalities. We report a hitherto rarely seen antisymmetric magnetoresistance (MR) effect in van der Waals heterostructured Fe3GeTe2/graphite/Fe3GeTe2 devices. Unlike conventional giant magnetoresistance (GMR) which is characterized by two resistance states, the MR in these vdW heterostructures features distinct high, intermediate and low resistance states. This unique characteristic is suggestive of underlying physical mechanisms that differ from those observed before. After theoretical calculations, the three resistance behavior was attributed to a spin momentum locking induced spin polarized current at the graphite/FGT interface. Our work reveals that ferromagnetic heterostructures assembled from vdW materials can exhibit substantially different properties to those exhibited by similar heterostructures grown in vacuum. Hence, it highlights the potential for new physics and new spintronic applications to be discovered using vdW heterostructures.

arXiv comment35 pages (Accepted by Science Advances)

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• Magnetic ground state and electron doping tuning of Curie temperature in Fe${}_3$GeTe${}_2$: first-principles studies
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• Strong magneto-optical and anomalous transport manifestations in two-dimensional van der Waals magnets Fe${}_n$GeTe${}_2$ ($n$ = 3, 4, 5)
• Elusive Dzyaloshinskii-Moriya interaction in Fe${}_3$GeTe${}_2$ monolayer
• Wafer-scale epitaxial growth of the thickness-controllable van der Waals ferromagnet CrTe2 for reliable magnetic memory applications
• Room temperature magnetic phase transition in an electrically-tuned van der Waals ferromagnet
• Current-Perpendicular-to-Plane Giant Magnetoresistance Effect in van der Waals Heterostructures
• The first- and second-order magneto-optical effects and intrinsically anomalous transport in 2D van der Waals layered magnets CrXY (X = S, Se, Te; Y = Cl, Br, I)
• Understanding and tuning magnetism in layered Ising-type antiferromagnet FePSe3 for potential 2D magnet
• Imaging current control of magnetization in Fe${}_3$GeTe${}_2$ with a widefield nitrogen-vacancy microscope
• Josephson spin-valve realization in the magnetic nodal-line topological semimetal Fe${}_3$GeTe${}_2$
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• Crossover from relativistic to non-relativistic net magnetization for MnTe altermagnet candidate
• Evidence for surface spin structures from first order reversal curves in Co3Sn2S2 and Fe3GeTe2 magnetic topological semimetals
• Field-induced spin polarization in lightly Cr-substituted layered antiferromagnet NiPS3
• Unconventional superconducting diode effects via antisymmetry and antisymmetry breaking
• Anomalous Hall and Nernst effects in the Two-Dimensional ferromagnetic metal FePd2Te2
• Magnetization symmetry for the MnTe altermagnetic candidate
• Direct evidence from high-field magnetotransport for a dramatic change of quasiparticle character in van der Waals ferromagnet Fe${}_{3-x}$GeTe${}_2$
• Giant gate-controlled odd-parity magnetoresistance in one-dimensional channels with a magnetic proximity effect
• Odd-parity longitudinal magnetoconductivity in time-reversal symmetry broken materials
• Magnetocaloric effect for the topological semimetal Co${}_3$Sn${}_2$S${}_2$ due to the antiferromagnetic coupling of the bulk and surface spin-polarized phases