Domain wall pinning and hard magnetic phase in Co-doped bulk single crystalline Fe3GeTe2

Abstract

We report the effects of cobalt doping on the magnetic properties of two-dimensional van der Waals ferromagnet Fe3GeTe2. Single crystals of (Fe{1-x}Cox)3GeTe2 with x=0-0.78 were successfully synthesized and characterized with x-ray diffraction, energy dispersive x-ray spectroscopy and magnetization measurements. Both the Curie-Weiss temperature and ferromagnetic (FM) ordered moment of Fe3GeTe2 are gradually suppressed upon Co doping. A kink in zero-field-cooling low field M(T) curve which is previously explained as an antiferromagnetic transition is observed for samples with x=0-0.58. Our detailed magnetization measurements and theoretical calculations strongly suggest that this kink is originated from the pinning of magnetic domain walls. The domain pinning effects are suddenly enhanced when the doping concentration of cobalt is around 50%, both the coercive field Hc and the magnetic remanence to saturated magnetization ratio MR/MS are largely improved and a hard magnetic phase emerges in bulk single crystal samples. The strong doping dependent magnetic properties suggest more spintronic applications of Fe3GeTe2.

6 pages, 4 figures, accepted by PRB

References in corpus (21)

• Van der Waals heterostructures
• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Van der Waals Density Functional for General Geometries
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Van der Waals density functionals applied to solids
• High-mobility transport anisotropy and linear dichroism in few-layer black phosphorus
• A Higher-Accuracy van der Waals Density Functional
• Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe${}_3$GeTe${}_2$
• Giant Tunneling Magnetoresistance in Spin-Filter van der Waals Heterostructures
• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• Hard magnetic properties in nanoflake van der Waals Fe3GeTe2
• 1D van der Waals Material Tellurium: Raman Spectroscopy under Strain and Magneto-transport
• Magnetic structure and phase stability of the van der Waals bonded ferromagnet Fe3-xGeTe2
• Few-layer Tellurium: one-dimensional-like layered elementary semiconductor with striking physical properties
• Electric Field Effect in Multilayer Cr2Ge2Te6: a Ferromagnetic Two-Dimensional Material
• Interlayer electronic hybridization leads to exceptional thickness-dependent vibrational properties in few-layer black phosphorus
• Layer- and doping-tunable long range ferromagnetic order-ing in two-dimensional CrS2
• A family of high-temperature ferromagnetic monolayers with locked spin-dichroism-mobility anisotropy: MnNX and CrCX (X=Cl, Br, I; C=S, Se, Te)
• Pinning of Domain Walls in thin Ferromagnetic Films
• The Effect of Nickel Substitution on Magnetism in the Layered van der Waals Ferromagnet Fe${}_3$GeTe${}_2$
• Dependence of Dzyaloshinskii-Moriya interaction on the oxygen coverage in Pt/Co/MOx trilayers

Cited by in corpus (16)

• Tunable magnetic properties in van der Waals crystals (Fe${}_{1-x}$Co${}_x$)${}_5$GeTe${}_2$
• Tuning Magnetic Order in the van der Waals Metal Fe5GeTe2 by Cobalt Substitution
• Effects of Fe deficiency and Co substitution in polycrystalline and single crystals of Fe${}_3$GeTe${}_2$
• Interlayer magnetism in Fe3-xGeTe2
• FePd2Te2: An Anisotropic Two-Dimensional Ferromagnet with One-Dimensional Fe Chains
• Tuning the Room Temperature Ferromagnetism in Fe5GeTe2 by Arsenic Substitution
• Antiferromagnetic fluctuations and orbital-selective Mott transition in the van der Waals ferromagnet Fe3-xGeTe2
• Relating spin-polarized STM imaging and inelastic neutron scattering in the van-der-Waals ferromagnet Fe3GeTe2
• Anisotropic magnetic properties and tunable conductivity in two-dimensional layered NaCrX2 (X=Te,Se,S) single crystals
• Magnetic damping anisotropy in the two-dimensional van der Waals material Fe${}_3$GeTe${}_2$ from first principles
• Field-induced spin polarization in lightly Cr-substituted layered antiferromagnet NiPS3
• Peculiar magnetic and magneto-transport properties in a non-centrosymmetric self-intercalated van der Waals ferromagnet Cr5Te8
• Magnetic properties of van der Waals layered single crystals DyOBr and SmOCl
• Interlayer magnetic interactions and ferroelectricity in $\pi$/3-twisted CrX${}_2$ (X = Se, Te) bilayers
• Unconventional Hall effect and its variation with Co-doping in van der Waals Fe3GeTe2
• Robustness of ferromagnetism in van der Waals magnet Fe${}_3$GeTe${}_2$ to hydrostatic pressure