Magnetoresistance and anomalous Hall effect in micro-ribbons of the magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$

Abstract

Magnetic Weyl semimetals exhibit intriguing transport phenomena due to their non-trivial band structure. Recent experiments in bulk crystals of the shandite-type Co${}_3$Sn${}_2$S${}_2$ have shown that this material system is a magnetic Weyl semimetal. To access the length scales relevant for chiral transport, it is mandatory to fabricate microstructures of this fascinating compound. We therefore have cut micro-ribbons (typical size $0.3\times 3\times 50$μ$m^3$) from Co${}_3$Sn${}_2$S${}_2$ single crystals using a focused beam of Ga${}^{2+}$-ions and investigated the impact of the sample dimensions and possible surface doping on the magnetotransport properties. The large intrinsic anomalous Hall effect observed in the micro ribbons is quantitatively consistent with the one in bulk samples. Our results show that focused ion beam cutting can be used for nano-patterning single crystalline Co${}_3$Sn${}_2$S${}_2$, enabling future transport experiments in complex microstructures of this Weyl semimetal.

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Cited by in corpus (6)

• Topological Kagome magnet Co3Sn2S2 thin flakes with high electron mobility and large anomalous Hall effect
• Pressure-tunable large anomalous Hall effect of the ferromagnetic kagome-lattice Weyl semimetal Co3Sn2S2
• Hidden spin-texture at topological domain walls drive exchange bias in a Weyl semimetal
• Observation of an unexpected negative magnetoresistance in magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$
• Observation of large intrinsic anomalous Hall conductivity in polycrystalline Mn${}_3$Sn films
• On the Onsager-Casimir reciprocal relations in a tilted Weyl semimetal