Anomalous Hall effect of the quasi-two-dimensional weak itinerant ferromagnet Cr4.14Te8

Abstract

The anomalous Hall effect (AHE), a manifestation of the Hall effect driven by the Berry curvature, has numerous applications in spintronics and valleytronics. However, its realization in quasi-two-dimensional (quasi-2D) chromium tellurides remains puzzling. In this paper, we synthesize the Cr4.14Te8 single crystal and find that it shows weak itinerant ferromagnetic (FM) metallic behavior with a large magnetocrystalline anisotropy. At the same time, Cr4.14Te8 exhibits the AHE below the FM phase-transition temperature . By taking into account the scaling behavior between the anomalous Hall resistivity and the longitudinal resistivity , the origin of the AHE in this system is suggested to stem from the skew-scattering mechanism. Moreover, the possible magnetic ground state in Cr4.14Te8 has also been discussed to reveal the origin of AHE. Our results may be helpful for exploring the potential applications of these kinds of quasi-2D FM metals.