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.

References in corpus (4)

• Anomalous Hall effect
• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Scalar spin chirality and quantum Hall effect on a triangular lattice
• Unconventional Anomalous Hall Effect in the Metallic Triangular-Lattice Magnet PdCrO2

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