Investigation of the Anomalous and Topological Hall Effects in Layered Monoclinic Ferromagnet Cr${}_{2.76}$Te${}_4$

Abstract

We studied the electrical transport, Hall effect, and magnetic properties of monoclinic layered ferromagnet Cr${}_{2.76}$Te${}_4$. Our studies demonstrate Cr${}_{2.76}$Te${}_4$ to be a soft ferromagnet with strong magnetocrystalline anisotropy. Below 50 K, the system shows an antiferromagnetic-like transition. Interestingly, between 50 and 150 K, we observe fluctuating magnetic moments between in-plane and out-of-plane orientations, leading to non-coplanar spin structure. On the other hand, the electrical resistivity data suggest it to be metallic throughout the measured temperature range, except a $kink$ at around 50 K due to AFM ordering. The Rhodes-Wohlfarth ratio $\frac{{\mu }_{eff}}{{\mu }_s}=1.89(>1)$ calculated from our magnetic studies confirms that Cr${}_{2.76}$Te${}_4$ is an itinerant ferromagnet. Large anomalous Hall effect has been observed due to the skew-scattering of impurities and the topological Hall effect has been observed due to non-coplanar spin-structure in the presence of strong magnetocrystalline anisotropy. We examined the mechanism of anomalous Hall effect by employing the first principles calculations.

9 pages, 6 figures, To appear in Physical Review Materials

Cited by in corpus (3)

• Intricate magnetic interactions and topological Hall effect observed in itinerant room-temperature layered ferromagnet Cr0.83Te
• Giant Nernst Angle in Self-Intercalated van der Waals Magnet Cr${}_{1.25}$Te${}_2$
• Sn${}_{0.06}$Cr${}_3$Te${}_4$: A Skyrmion Superconductor