Intrinsic and extrinsic anomalous transport properties of Heusler ferromagnets Fe${}_2$CoAl and Fe${}_2$NiAl from first principles

Abstract

Recently, Heusler ferromagnets have been found to exhibit unconventional anomalous electric, thermal, and thermoelectric transport properties. In this study, we employed first-principles density functional theory calculations to systematically investigate both intrinsic and extrinsic contributions to the anomalous Hall effect (AHE), anomalous Nernst effect (ANE), and anomalous thermal Hall effect (ATHE) in two Heusler ferromagnets: Fe${}_2$CoAl and Fe${}_2$NiAl. Our analysis reveals that the extrinsic mechanism originating from disorder dominates the AHE and ATHE in Fe${}_2$CoAl , primarily due to the steep band dispersions across the Fermi energy and corresponding high longitudinal electronic conductivity. Conversely, the intrinsic Berry phase mechanism, physically linked to nearly flat bands around the Fermi energy and gapped by spin-orbit interaction band crossings, governs the AHE and ATHE in Fe${}_2$NiAl. With respect to ANE, both intrinsic and extrinsic mechanisms are competing in Fe${}_2$CoAl as well as in Fe${}_2$NiAl. Furthermore, Fe${}_2$CoAl and Fe${}_2$NiAl exhibit tunable and remarkably pronounced anomalous transport properties. For instance, the anomalous Nernst and anomalous thermal Hall conductivities in Fe${}_2$NiAl attain giant values of 8.29 A/Km and 1.19 W/Km, respectively, at room temperature. To provide a useful comparison, we also thoroughly investigated the anomalous transport properties of Co${}_2$MnGa. Our findings suggest that Heusler ferromagnets Fe${}_2$CoAl and Fe${}_2$NiAl are promising candidates for spintronics and spin-caloritronics applications.

9 pages, 5 figures

References in corpus (28)

• Wannier90 as a community code: new features and applications
• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Observation of the Magnon Hall Effect
• Berry phase effect in anomalous thermoelectric transport
• Universal Scaling Behavior of Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets
• Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
• Intrinsic vs. extrinsic anomalous Hall effect in ferromagnets
• Anomalous Hall Effect in Weyl Metals
• Semiclassical theories of the anomalous Hall effect
• Zero-field Nernst effect in a ferromagnetic kagome-lattice Weyl-semimetal Co3Sn2S2
• Anomalous Hall effect in 2D Dirac band: link between Kubo-Streda formula and semiclassical Boltzmann equation approach
• Half-integer quantized anomalous thermal Hall effect in the Kitaev material $\alpha$-RuCl${}_3$
• Mott Relation for Anomalous Hall and Nernst effects in Ga1-xMnxAs Ferromagnetic Semiconductors
• Giant room temperature anomalous Hall effect and magnetically tuned topology in the ferromagnetic Weyl semimetal Co2MnAl
• Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn${}_3$$X$, $X$ = Sn, Ge
• Fermi level tuning and atomic ordering induced giant anomalous Nernst effect in Co2MnAl1-xSix Heusler alloy
• Anomalous transverse response of Co${}_2$MnGa and universality of the room-temperature ${\alpha }_{ij}^A/{\sigma }_{ij}^A$ ratio across topological magnets
• Spin-order dependent anomalous Hall effect and magneto-optical effect in noncollinear antiferromagnets Mn${}_{3}X$N ($X$ = Ga, Zn, Ag, and Ni)
• Anomalous Thermal Hall Effect in an Insulating van der Waals Magnet VI3
• Scattering-Independent Anomalous Nernst Effect in Ferromagnets
• Transition from Intrinsic to Extrinsic Anomalous Hall Effect in the Ferromagnetic Weyl Semimetal PrAlGe${}_{1-x}$Si${}_x$
• Anomalous thermal Hall effect and anomalous Nernst effect of CsV${}_3$Sb${}_5$
• Giant Anomalous Nernst Effect in Noncollinear Antiferromagnetic Mn-based Antiperovskite Nitrides
• Enhanced anomalous Nernst effect in disordered Dirac and Weyl materials
• Fully spin-polarized nodal loop semimetals in alkaline-metal monochalcogenide monolayers
• Structural, magnetic, and magnetocaloric properties of Fe2CoAl Heusler nanoalloy
• Sensitivity of anomalous Hall effect to disorder correlations
• Giant anomalous thermal Hall effect in tilted type-I magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$

Cited by in corpus (1)

• Chemical-substitution-driven giant anomalous Hall and Nernst effects in magnetic cubic Heusler compounds