Anomalous Hall effect in tetragonal antiperovskite GeNFe3 with a frustrated ferromagnetic state
We report observed anomalous Hall effect (AHE) behavior in the antiperovskite compound GeNFe3 with a tetragonal symmetry. The anomalous Hall coefficient RH was estimated and exhibits a broad peak near the ferromagnetic (FM)–paramagnetic (PM) phase transition, and reduces to zero in the PM phase. The sign of the ordinary Hall coefficient R0 changes sharply as a function of temperature, which provides evidence for the switching of different domain carriers. The relationship between the RH and ρxx data was also plotted using the scaling law RH = aρxx0 + bρxxγ, and the parameter γ is found to be about 0.99. These results suggest that the mechanism of the AHE for tetragonal GeNFe3 is mainly due to skew scattering. This finding enriches the understanding of the AHE mechanism for antiperovskite compounds, and the unusual mechanism for GeNFe3 is considered to be closely related to the unique tetragonal crystal structure and frustrated FM ground state of antiperovskite compounds.