Exploring the magnetic and transport properties of the new bulk ferromagnets FeCr₃Te₆ and Fe₄Ga

Magnetic materials with topological spin textures are systems that have emerging electromagnetic properties with significant applications. Recent advancements in the growth and characterization of ferromagnetic crystals unfold new platforms for studying the interplay between magnetism and topology. Here we report synthesis, electrical, and magnetic characterization of novel single-crystalline ferromagnetic compounds FeCr₃Te₆ and Fe₄Ga, with Curie temperatures T_c exceeding 150 K and at least 350 K, respectively. The anomalous Hall conductivity of the FeCr₃Te₆ displays a maximum of ~ 40.68 Ω^-1 cm^-1 at 2 K under μ₀H ≅ 1 T decreasing as the temperature increases. FeCr₃Te₆ displays large coercive fields, i.e., exceeding μ₀H ≅1 T below T = 75 K. In contrast, Fe₄Ga display no-coercivity and an anomalous Hall response that is nearly independent of T all the way up to T ≅ 350 K. The anomalous Hall conductivity measured at 2 K is found to reach ~ 725.38 Ω^-1 cm^-1 under an external field of 1 T. With time permitting, we will compare their response with those of their sister compounds.