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Oxide materials exhibit several novel structural, magnetic, and electronicproperties. Their stability under ambient conditions, easy synthesis, and hightransition temperatures provide such systems with an ideal ground for realizingtopological properties and real-life technological applications. However,experimental evidence of topological states in oxide materials is rare. In thisstudy, we have synthesized single crystals of oxide double perovskite Sr2FeMoO6and revealed its topological nature by investigating its structural, magnetic,and electronic properties. We observed that the system crystallized in thecubic space group Fm-3m, which is a half-metallic ferromagnet. Transportmeasurements show an anomalous Hall effect, and it is evident that the Hallcontribution originates from the Berry curvature. Assuming a shift of the Fermienergy towards the conduction band, the contribution of the anomalous Halleffect is enhanced owing to the presence of a gaped nodal line. This study canbe used to explore and realize the topological properties of bulk oxidesystems.

Berry curvature induced anomalous Hall conductivity in magnetic topological oxide double perovskite Sr2FeMoO6