Anomalous Hall effect in van der Waals bonded ferromagnet Fe${}_{3-x}$GeTe${}_2$

Abstract

We report anomalous Hall effect (AHE) in single crystals of quasi-two-dimensional Fe${}_{3-x}$GeTe${}_2$ ($x\approx 0.36$) ferromagnet grown by the flux method which induces defects on Fe site and bad metallic resistivity. Fe K-edge x-ray absorption spectroscopy was measured to provide information on local atomic environment in such crystals. The dc and ac magnetic susceptibility measurements indicate a second-stage transition below 119 K in addition to the paramagnetic to ferromagnetic transition at 153 K. A linear scaling behavior between the modified anomalous Hall resistivity ${\rho }_{xy}/{\mu }_0{H}_{eff}$ and longitudinal resistivity ${\rho }_{xx}^{2}M/{\mu }_0{H}_{eff}$ implies that the AHE in Fe${}_{3-x}$GeTe${}_2$ should be dominated by the intrinsic Karplus-Luttinger mechanism rather than the extrinsic skew-scattering and side-jump mechanisms. The observed deviation in the linear-M Hall conductivity ${\sigma }_{xy}^A$ below 30 K is in line with its transport characteristic at low temperatures, implying the scattering of conduction electrons due to magnetic disorder and the evolution of the Fermi surface induced by possible spin-reorientation transition.

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• Planar topological Hall effect in a uniaxial van der Waals ferromagnet Fe3GeTe2
• Anomalous Hall effect in half-metallic Heusler compound Co${}_2$Ti$X$ ($X$=Si, Ge)
• Pressure-Induced Modification of Anomalous Hall Effect in Layered Fe${}_3$GeTe${}_2$
• Anisotropic magnetocaloric effect in Fe${}_{3-x}$GeTe${}_2$
• Neutron spectroscopy evidence on the dual nature of magnetic excitations in a van der Waals metallic ferromagnet Fe${}_{2.72}$GeTe${}_2$
• Lattice dynamics and phase transitions in Fe${}_{3-x}$GeTe${}_2$
• Magnetic excitations in the quasi-2D ferromagnet Fe3-xGeTe2 measured with inelastic neutron scattering
• Electronic correlations in the van der Waals ferromagnet Fe${}_3$GeTe${}_2$ revealed by its charge dynamics
• $\mathrm{F}{\mathrm{e}}_3\mathrm{GeT}{\mathrm{e}}_2$: A site-differentiated Hund metal
• Unusual magnetotransport and anomalous Hall effect in quasi-two-dimensional van der Waals ferromagnet Fe${}_4$GeTe${}_2$
• Antiferromagnetic fluctuations and orbital-selective Mott transition in the van der Waals ferromagnet Fe3-xGeTe2
• Dynamical mean-field study of Vanadium diselenide monolayer ferromagnetism
• Sign-reversed anomalous Nernst effect in the ferromagnetic Weyl-semimetal Fe${}_{3-x}$GeTe${}_2$: the role of Fe vacancies
• Fe${}_{5-x}$Ge${}_2$Te${}_2$ -- A new exfoliable itinerant ferromagnet with high Curie temperature and large perpendicular magnetic anisotropy
• Electron transport and scattering mechanisms in ferromagnetic monolayer Fe${}_3$GeTe${}_2$
• Spin filtering effect in intrinsic 2D magnetic semiconductor Cr2Ge2Te6
• Anomalous Hall and Nernst effects in the Two-Dimensional ferromagnetic metal FePd2Te2
• Direct evidence from high-field magnetotransport for a dramatic change of quasiparticle character in van der Waals ferromagnet Fe${}_{3-x}$GeTe${}_2$