Abstract
Recently, β-Mn-type Co-Zn-Mn alloys have gained particular attentions as a new class of chiral magnets hosting skyrmion phase. Here, we report the magnetization, magnetoelastic characterization, and transport properties of the chiral magnet Co7Zn8Mn5. The results establish the general features related to the formation of skyrmions, which are found in a small temperature window just below the magnetic Curie temperature Tc. The longitudinal resistivity increases with decreasing temperature at low temperatures due to the enhancement of electron scattering, where the spin-glass state appears. And the resistivity is not affected nearly by the applied magnetic field. In addition, we present the experimental observation of a large anomalous Hall effect (AHE). The anomalous Hall signal abnormally increases at temperatures away from Tc. Quantitative analyses of the measured data suggest that the AHE is dominated by skew-scattering mechanism.
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