Data repository for Article "Harnessing magnetic anisotropy for nonlinear magnetization precession and spin waves"

TitleNonlinear magnetization dynamics in a thin iron film: from anharmonic precession to propagating spin waves This dataset contains the experimental and numerical data supporting the findings of the above article. We investigate nonlinear magnetization dynamics in a 20‑nm epitaxial Fe(001) film excited by femtosecond laser pulses. The data demonstrate: Anharmonicity of the uniform magnetization precession Generation of higher harmonics up to the 4th order Nonlinear frequency shift and magnetic rectification Second‑harmonic generation in propagating magnetostatic surface magnetostatic wave packets Both time‑resolved magneto‑optical Kerr effect (TR‑MOKE) measurements and numerical solutions of the Landau‑Lifshitz‑Gilbert equation (macrospin and micromagnetic simulations) are included. File structure The dataset is packaged as a single archive named exactly as the article title. It contains 26 CSV files. Each file name follows the pattern: Fig<X><panel>[_<curve>].csv All CSV files are UTF‑8 encoded, comma‑separated, and include a header line describing the columns.