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Title: Anomalous Hall effect in the van der Waals bonded ferromagnet Fe 3 - x GeTe 2

Journal Article · · Physical Review B

Here, we report the anomalous Hall effect (AHE) in single crystals of a quasi-two-dimensional Fe3–xGeTe2 (x ≈ 0.36) ferromagnet grown by the flux method which induces defects on the Fe site and bad metallic resistivity. Fe K-edge x-ray absorption spectroscopy was measured to provide information on the 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 ρxy/μ0Heff and longitudinal resistivity ρ2xxM/μ0Heff implies that the AHE in Fe3–xGeTe2 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 σAxy 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 a possible spin-reorientation transition.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1440350
Alternate ID(s):
OSTI ID: 1432424
Report Number(s):
BNL-205728-2018-JAAM; PRBMDO; TRN: US1900720
Journal Information:
Physical Review B, Vol. 97, Issue 16; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

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Cited By (7)

Lattice Dynamics, Phonon Chirality, and Spin–Phonon Coupling in 2D Itinerant Ferromagnet Fe 3 GeTe 2 journal September 2019
Fe 5− x Ge 2 Te 2 —a New Exfoliable Itinerant Ferromagnet with High Curie Temperature and Large Perpendicular Magnetic Anisotropy journal December 2019
The van der Waals Ferromagnets Fe 5- δ GeTe 2 and Fe 5- δ -x Ni x GeTe 2 - Crystal Structure, Stacking Faults, and Magnetic Properties : The van der Waals Ferromagnets Fe journal November 2018
A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling journal January 2020
Anisotropic magnetocaloric effect in Fe3−xGeTe2 journal September 2019
Antisymmetric magnetoresistance in van der Waals Fe 3 GeTe 2 /graphite/Fe 3 GeTe 2 trilayer heterostructures journal July 2019
Anisotropic magnetocaloric effect in Fe$_{3-x}$GeTe$_2$ text January 2019

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