Data underlying the publication: Third-order nonlinear Hall effect in Altermagnets RuO₂

This dataset supports the study of the third-order nonlinear Hall effect in the altermagnetic RuO₂. High-quality RuO₂ thin films were epitaxially grown on TiO₂ substrates. Nonlinear transport measurements were performed using a low-frequency lock-in technique (166 Hz) with an AC current. The data include first and third harmonic voltage–current traces when the current is applied along different crystal orientations , and the angle dependent third-harmonic voltage-current curves in RuO₂(001). This dataset provides reproducible evidence of the symmetry-dependent nonlinear Hall response characteristic of altermagnetic RuO₂.