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Updated: Jun 4, 2025
Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
Anomalous and large topological Hall effects inβ-Mn chiral compound Co6.5Ru1.5Zn8Mn4: electron electron interaction
Afsar Ahmed1, Arnab Bhattacharya1, I Das1
1CMP Division, Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata 700064, India.
Abstract:
β-Mn-type chiral cubic CoZnMn(x+y+z= 20) alloys present a intriguing platform for exploring topological magnetic orderings with promising spintronic potential. This study examines the magnetotransport properties of Co6.5Ru1.5Zn8Mn4, a skyrmion-hostingβ-Mn-type chiral compound. The longitudinal resistivity (ρ) exhibits field-insensitive low-temperature minima due to quantum interference effects, driven byT1/2-dependent electron-electron interactions. We observe a substantial intrinsic anomalous Hall conductivity, unaffected by quantum interference. Additionally, a pronounced topological Hall effect is observed at the metastable skyrmionic state, persisting up toTCand achieving notable magnitudes for stoichiometric compounds. These results position the CoZnMnfamily favourably to leverage the rich pallete of emergent magnetotransport properties for spintronic applications.
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