Tunable magnetic properties in van der Waals crystals (Fe${}_{1-x}$Co${}_x$)${}_5$GeTe${}_2$

Abstract

We report the doping effects of cobalt on van der Waals (vdW) magnet Fe${}_5$GeTe${}_2$. A series of (Fe${}_{1-x}$Co${}_x$)${}_5$GeTe${}_2$ (0$\le$x$\le$0.44) single crystals have been successfully grown, their structural, magnetic and transport properties are investigated. For x=0.20, The Curie temperature $T_C$ increases from 276~K to 337~K. Moreover, the magnetic easy-axis is reoriented to the $ab$-plane from the $c$-axis in undoped Fe${}_5$GeTe${}_2$ with largely enhanced magnetic anisotropy. These magnetic properties would make (Fe${}_{0.8}$Co${}_{0.2}$)${}_5$GeTe${}_2$ more effective in stabilizing magnetic order in the two-dimensional limit. A complex magnetic phase diagram is identified on the higher doping side. The x=0.44 crystal first orders ferromagnetically at $T_C$=363~K then undergoes an antiferromagnetic transition at $T_N$=335~K. Furthermore magnetic-field-induced spin-flop transitions are observed for the AFM ground state. Our work reveals (Fe${}_{1-x}$Co${}_x$)${}_5$GeTe${}_2$ as promising candidates for developing new spin-related applications and proposes a method to engineer the magnetic properties of vdW magnet.

arXiv comment5 pages, 5 figures

References in corpus (11)

• Antiferromagnetic spintronics
• Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe${}_3$GeTe${}_2$
• Two-Dimensional Itinerant Ising Ferromagnetism in Atomically thin Fe3GeTe2
• Tunneling spin valves based on Fe${}_3$GeTe${}_2$/hBN/Fe${}_3$GeTe${}_2$ van der Waals heterostructures
• Stacking tunable interlayer magnetism in bilayer CrI3
• Observation of Magnetic Skyrmion Bubbles in a van der Waals ferromagnet Fe3GeTe2
• Highly efficient spin-orbit torque and switching of layered ferromagnet Fe3GeTe2
• Layer- and doping-tunable long range ferromagnetic order-ing in two-dimensional CrS2
• Physical properties and thermal stability of Fe5GeTe2 single crystals
• Domain wall pinning and hard magnetic phase in Co-doped bulk single crystalline Fe3GeTe2
• The Effect of Nickel Substitution on Magnetism in the Layered van der Waals Ferromagnet Fe${}_3$GeTe${}_2$

Cited by in corpus (29)

• Tuning Magnetic Order in the van der Waals Metal Fe5GeTe2 by Cobalt Substitution
• Gate-controlled magnetic phase transition in a van der Waals magnet Fe${}_5$GeTe${}_2$
• Magnetic critical behavior of the van der Waals Fe5GeTe2 crystal with near room temperature ferromagnetism
• Pervasive beyond room-temperature ferromagnetism in a doped van der Waals magnet: Ni doped Fe${}_5$GeTe${}_2$ with $T_{\text{C}}$ up to 478 K
• Large-scale epitaxy of two-dimensional van der Waals room-temperature ferromagnet Fe5GeTe2
• Elusive Dzyaloshinskii-Moriya interaction in Fe${}_3$GeTe${}_2$ monolayer
• DyOCl: a rare-earth based two-dimensional van der Waals material with strong magnetic anisotropy
• Revealing room temperature ferromagnetism in exfoliated Fe${}_5$GeTe${}_2$ flakes with quantum magnetic imaging
• Large-area van der Waals epitaxy and magnetic characterization of Fe${}_3$GeTe${}_2$ films on graphene
• Above-room-temperature ferromagnetism in ultrathin van der Waals magnet
• FePd2Te2: An Anisotropic Two-Dimensional Ferromagnet with One-Dimensional Fe Chains
• Large-area synthesis of ferromagnetic Fe${}_{5-x}$GeTe${}_2$/graphene van der Waals heterostructures with Curie temperature above room temperature
• Tuning the Room Temperature Ferromagnetism in Fe5GeTe2 by Arsenic Substitution
• Antiferromagnetic order in Co-doped Fe${}_5$GeTe${}_2$ probed by resonant magnetic x-ray scattering
• Thermal cycling induced alteration of the stacking order and spin-flip in the room temperature van der Waals magnet Fe${}_5$GeTe${}_2$
• Stability of the In-Plane Room Temperature van der Waals Ferromagnet Chromium Ditelluride and Its Conversion to Chromium-Interleaved CrTe${}_2$ Compounds
• Anisotropic magnetic properties and tunable conductivity in two-dimensional layered NaCrX2 (X=Te,Se,S) single crystals
• Modification of unconventional Hall effect with doping at the non-magnetic site in a 2D van der Waals ferromagnet
• Field-induced spin polarization in lightly Cr-substituted layered antiferromagnet NiPS3
• Tuning magnetic anisotropy in Fe${}_5$GeTe${}_2$ monolayer through doping and strain
• Interface-Controlled Antiferromagnetic Tunnel Junctions based on a metallic van der Waals A-type Antiferromagnet
• Nearly-room-temperature ferromagnetism and tunable anomalous Hall effect in atomically thin Fe4CoGeTe2
• Magnetic properties of van der Waals layered single crystals DyOBr and SmOCl
• Quantum Imaging of Ferromagnetic van der Waals Magnetic Domain Structures at Ambient Conditions
• Anisotropic electron-phonon coupling and chiral phonons in van der Waals room temperature ferromagnet Fe${}_5$GeTe${}_2$
• A room temperature polar ferromagnetic metal
• Spin-Polarized Magnetic Metal Electrodes for Magnetic Tunnel Junctions
• Antiferromagnetic structure and magnetic properties of Dy2O2Te: An isostructural analog of the rare-earth superconductors R2O2Bi
• Van der Waals Antiferromagnets: From Early Discoveries to Future Directions in the 2D Limit