Anomalous Hall Effect in Layered Ferrimagnet MnSb2Te4**Supported by the National Natural Science Foundation of China under Grant Nos. 11961141011 and 61425015, the National Key Research and Development Program under Grant No. 2016YFA0300600, and the Strategic Priority Research Program of Chinese Academy of Sciences under Grant No. XDB28000000.

Abstract

We report on low-temperature electron transport properties of MnSb2Te4, a candidate of ferrimagnetic Weyl semimetal. Long-range magnetic order is manifested as a nearly square-shaped hysteresis loop in the anomalous Hall resistance, as well as sharp jumps in the magnetoresistance. At temperatures below 4 K, a lnT-type upturn appears in the temperature dependence of longitudinal resistance, which can be attributed to the electron-electron interaction (EEI), since the weak localization can be excluded by the temperature dependence of magnetoresistance. Although the anomalous Hall resistance exhibits a similar lnT-type upturn in the same temperature range, such correction is absent in the anomalous Hall conductivity. Our work demonstrates that MnSb2Te4 microflakes provide an ideal system to test the theory of EEI correction to the anomalous Hall effect.