Gigantic current control of coercive field and magnetic memory based on nm-thin ferromagnetic van der Waals Fe3GeTe2

Abstract

Controlling magnetic states by a small current is essential for the next-generation of energy-efficient spintronic devices. However, it invariably requires considerable energy to change a magnetic ground state of intrinsically quantum nature governed by fundamental Hamiltonian, once stabilized below a phase transition temperature. We report that surprisingly an in-plane current can tune the magnetic state of nm-thin van der Waals ferromagnet Fe3GeTe2 from a hard magnetic state to a soft magnetic state. It is the direct demonstration of the current-induced substantial reduction of the coercive field. This surprising finding is possible because the in-plane current produces a highly unusual type of gigantic spin-orbit torque for Fe3GeTe2. And we further demonstrate a working model of a new nonvolatile magnetic memory based on the principle of our discovery in Fe3GeTe2, controlled by a tiny current. Our findings open up a new window of exciting opportunities for magnetic van der Waals materials with potentially huge impacts on the future development of spintronic and magnetic memory.

Accepted by Advanced Materials; 61 pages, 4 main figures, 14 supporting figures

References in corpus (8)

• 2D materials and van der Waals heterostructures
• Magnetic 2D materials and heterostructures
• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• Highly efficient spin-orbit torque and switching of layered ferromagnet Fe3GeTe2
• Antisymmetric magnetoresistance in van der Waals Fe3GeTe2/graphite/Fe3GeTe2 tri-layer heterostructures
• Gate-Tuned Interlayer Coupling in van der Waals Ferromagnet Fe${}_3$GeTe${}_2$ Nanoflakes
• Bulk properties of van-der-Waals hard ferromagnet VI3
• Current Control of Magnetism in Two-Dimensional Fe3GeTe2

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• Efficient current-induced spin torques and field-free magnetization switching in a room-temperature van der Waals magnet
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• Strong bulk spin-orbit torques quantified in the van der Waals ferromagnet Fe3GeTe2
• All van der Waals three-terminal SOT-MRAM realized by topological ferromagnet Fe3GeTe2
• Spin-orbit torque for field-free switching in C_{3v} crystals
• Roadmap on Quantum Magnetic Materials
• Novel magnetic-field-free switching behavior in vdW-magnet/oxide heterostructure
• Imaging current control of magnetization in Fe${}_3$GeTe${}_2$ with a widefield nitrogen-vacancy microscope
• Magnetoelectric effect in van der Waals magnets
• Hidden interplay of current-induced spin and orbital torques in bulk Fe${}_3$GeTe${}_2$
• Lossless Spin-Orbit Torque in Antiferromagnetic Topological Insulator MnBi${}_2$Te${}_4$
• Strain-tunable magnetic and magnonic states in Ni-dihalide monolayers
• Electrical control of topological 3Q state in intercalated van der Waals antiferromagnet Cox-TaS2
• Artificially creating emergent interfacial antiferromagnetism and its manipulation in a magnetic van-der-Waals heterostructure
• Unexpected versatile electrical transport behaviors of ferromagnetic nickel films
• Spin-orbit Torque Switching in an All-Van der Waals Heterostructure
• Edge non-collinear magnetism in nanoribbons of Fe3GeTe2 and Fe3GaTe2
• Room temperature energy-efficient spin-orbit torque switching in wafer-scale all-vdW heterostructure
• Emergent giant topological Hall effect in twisted Fe3GeTe2 metallic system