Two-dimensional itinerant ferromagnetism in atomically thin Fe3GeTe2

  title={Two-dimensional itinerant ferromagnetism in atomically thin Fe3GeTe2},
  author={Zaiyao Fei and Bevin Huang and Paul Malinowski and Weiqi Wang and Tiancheng Song and Joshua J. Sanchez and Wang Yao and Di Xiao and Xiaoyang Zhu and Andrew F. May and Weida Wu and David H. Cobden and Jiun Haw Chu and Xiaodong Xu},
  journal={Nature Materials},
Discoveries of intrinsic two-dimensional (2D) ferromagnetism in van der Waals (vdW) crystals provide an interesting arena for studying fundamental 2D magnetism and devices that employ localized spins1–4. However, an exfoliable vdW material that exhibits intrinsic 2D itinerant magnetism remains elusive. Here we demonstrate that Fe3GeTe2 (FGT), an exfoliable vdW magnet, exhibits robust 2D ferromagnetism with strong perpendicular anisotropy when thinned down to a monolayer. Layer-number-dependent… 
Intrinsic 2D Ferromagnetism in V5Se8 Epitaxial Thin Films.
It is demonstrated that V5Se8 epitaxial thin films grown by molecular-beam epitaxy (MBE) exhibit emergent 2D ferromagnetism with intrinsic spin polarization of the V 3d electrons despite that the bulk counterpart is 'originally antiferromagnetic (AFM), broadening a lineup of 2D magnets to those potentially beneficial for future spintronics applications.
Tunable high-temperature itinerant antiferromagnetism in a van der Waals magnet
Tunable itinerant ferro- and antiferromagnetism in Co-doped Fe4GeTe2 utilizing the vdW interlayer coupling, extremely sensitive to the material composition is reported.
Layer-controlled Ferromagnetism in Atomically Thin CrSiTe$_3$ Flakes
The research on two-dimensional (2D) van der Waals (vdW) ferromagnets has promoted the development of ultrahigh-density and nanoscale data storage. However, intrinsic ferromagnetism in layered
Two-dimensional ferromagnetism in CrTe flakes down to atomically thin layers.
A new ultrathin hard magnetic material is presented, which has the potential to be fabricated and applied in spintronic devices massively and is successfully synthesized by the chemical vapor deposition (CVD) method and studied by the magneto-optical Kerr effect (MOKE) technique.
Intrinsic Room-Temperature Ferromagnetism in V2C MXene Nanosheets.
V2C MXene nanosheets with a small-angle twisting show a robust intrinsic ferromagnetic response with a saturation magnetic moment of 0.013 emu/g at room temperature and are highlighted as a promising intrinsic room-temperature ferrom magnetic material with potential applications in spintronics or spin-based electronics.
Robust Giant Magnetoresistance in 2D Van der Waals Molecular Magnetic Tunnel Junctions.
Using first-principles spin transport calculations, it is shown that single-molecule junctions based on Fe3GeTe2 can yield perfect spin filtering and a significant magnetoresistance (MR) of up to ∼6075%.
Antisymmetric magnetoresistance in van der Waals Fe3GeTe2/graphite/Fe3GeTe2 trilayer heterostructures
It is revealed that ferromagnetic heterostructures assembled from vdW materials can exhibit substantially different properties to those exhibited by similar heterostructure grown in vacuum.
Ferromagnetism in two-dimensional CrTe2 epitaxial films down to a few atomic layers
Two-dimensional (2D) van der Waals ferromagnetic materials have attracted intense attention due to their potential impact on both fundamental and applied research studies. Recently, a new 2D
Hard ferromagnetic behavior in atomically thin CrSiTe3 flakes.
The research on two-dimensional (2D) van der Waals (vdW) magnets has promoted the development of ultrahigh-density data storage and nanoscale spintronic devices. However, the soft ferromagnetic
Ising ferromagnetism and robust half-metallicity in two-dimensional honeycomb-kagome Cr2O3 layer
In contrast to the current research on two-dimensional (2D) materials, which is mainly focused on graphene and transition metal dichalcogenide-like structures, studies on 2D transition metal oxides


Layer-dependent ferromagnetism in a van der Waals crystal down to the monolayer limit
Since the discovery of graphene, the family of two-dimensional materials has grown, displaying a broad range of electronic properties. Recent additions include semiconductors with spin–valley
Wafer-scale two-dimensional ferromagnetic Fe3GeTe2 thin films grown by molecular beam epitaxy
Recently, layered two-dimensional ferromagnetic materials (2D FMs) have attracted a great deal of interest for developing low-dimensional magnetic and spintronic devices. Mechanically exfoliated 2D
Strong anisotropy and magnetostriction in the two-dimensional Stoner ferromagnet Fe3GeTe2
Computationally characterizing magnetic properies of novel two-dimensional (2D) materials serves as an important first step of exploring possible applications. Using density-functional theory, we
Emergence of Kondo lattice behavior in a van der Waals itinerant ferromagnet, Fe3GeTe2
This work expands the limit of ferromagnetic HF materials from f- to d-electron systems and illustrates the positive correlation between ferromagnetism and HF state in the 3d-electrons material, which is quite different from the f-Electron systems.
Ligand-field helical luminescence in a 2D ferromagnetic insulator
Bulk chromium tri-iodide (CrI3) has long been known as a layered van der Waals ferromagnet1. However, its monolayer form was only recently isolated and confirmed to be a truly two-dimensional (2D)
Strong room-temperature ferromagnetism in VSe2 monolayers on van der Waals substrates
Reducing the dimensionality of paramagnetic V Se2 results in the emergence of ferromagnetism that is observed in a monolayer and up to room temperature, making VSe2 an attractive material for van der Waals spintronics applications.
Discovery of intrinsic ferromagnetism in two-dimensional van der Waals crystals
It is concluded that Cr2Ge2Te6 is a nearly ideal two-dimensional Heisenberg ferromagnet and so will be useful for studying fundamental spin behaviours, opening the door to exploring new applications such as ultra-compact spintronics.
Magnetic Properties of Layered Itinerant Electron Ferromagnet Fe3GeTe2
We have successfully synthesized a single-crystal sample of the layered structure ferromagnet Fe3GeTe2 and present the results of its complete characterization using powder X-ray diffraction (XRD),
Magnetic microstructure and magnetic properties of uniaxial itinerant ferromagnet Fe3GeTe2
Magnetic force microscopy was used to observe the magnetic microstructure of Fe3GeTe2 at 4 K on the (001) surface. The surface magnetic structure consists of a two-phase domain branching pattern that
Van der Waals engineering of ferromagnetic semiconductor heterostructures for spin and valleytronics
The photoluminescence detection of valley pseudospin provides a simple and sensitive method to probe the intriguing domain dynamics in the ultrathin magnet, as well as the rich spin interactions within the heterostructure.