Spin Spiral and Topological Hall Effect in a Metamagnet Fe${}_3$Ga${}_4$

Abstract

A new mechanism for Topological Hall Effect (THE) was recently proposed for the spiral magnet YMn${}_6$Sn${}_6,$ which requires transverse conical spiral (TCS) magnetism, induced by external magnetic field, combined with thermally excite helical spiral magnons. In principle, this mechanism should be applicable to other itinerant spiral magnets as well. In this paper, we show that another metamagnetic compound, Fe${}_3$Ga${}_4$, where THE was observed experimentally before, in one of its phases satisfies this condition, and the proposed theory of thermal-fluctuation driven THE is quantitatively consistent with the experiment. This finding suggests that this mechanism is indeed rather universal, and the effect may have been observed in other compounds before, but overlooked.

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Cited by in corpus (8)

• Topological Hall effect induced by chiral fluctuations in ErMn6Sn6
• Frustration model and spin excitations in the helimagnet FeP
• Fluctuation-driven topological Hall effect in room-temperature itinerant helimagnet Fe3Ga4
• Topological Hall effect induced by classical large-spin background: $su(2)$ path-integral approach
• Large Anomalous and Topological Hall Effect and Nernst Effect in a Dirac Kagome Magnet Fe3Ge
• EuAuSb: An odd-parity helical variation on altermagnetism
• The effect of vanadium substitution on the structural and magnetic properties of (Fe${}_{1-x}$V${}_x$)${}_3$Ga${}_4$
• Large unconventional anomalous Hall effect far above room temperature in epitaxial Fe${}_3$Ga${}_4$ films