Hall effect of spin-chirality origin in a triangular-lattice helimagnet Fe1.3Sb

Abstract

We report on a topological Hall effect possibly induced by scalar spin chirality in a quasi-two- dimensional helimagnet Fe${}_{1+x}$Sb. In the low-temperature region where the spins on interstitial- Fe (concentration $x=0.3$) intervening the $120^{\circ }$ spin-ordered triangular planes tend to freeze, a non-trivial component of Hall resistivity with opposite sign of the conventional anomalous Hall term is observed under magnetic field applied perpendicular to the triangular-lattice plane. The observed unconventional Hall effect is ascribed to the scalar spin chirality arising from the heptamer spin-clusters around the interstitial-Fe sites, which can be induced by the spin modulation by the Dzyaloshinsky-Moriya interaction.

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• Magnetic structure of the conductive triangular-lattice antiferromagnet PdCrO2
• Large anisotropic topological Hall effect in a hexagonal non-collinear magnet Fe5Sn3
• Chiral spin density wave order on frustrated honeycomb and bilayer triangle lattice Hubbard model at half-filling
• High-temperature large-gap quantum anomalous Hall insulator in ultrathin double perovskite films
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• Ordering phenomena of spin trimers accompanied by large geometrical Hall effect
• Tuning of Electrical, Magnetic, and Topological Properties of Magnetic Weyl Semimetal Mn${}_{3+x}$Ge by Fe doping
• Planar topological Hall effect in a hexagonal ferromagnetic Fe5Sn3 single crystal
• Investigating the origin of topological-Hall-like resistivity in Zn-doped Mn2Sb ferrimagnet