We analyze the magnetization dynamics and magnetic anisotropy in bulk single crystalline Fe5GeTe2, a van der Waals 2D ferromagnet, using broadband Ferromagnetic Resonance Spectroscopy. We find sizable anisotropy in the Lande g factor at room temperature which is attributed to anisotropic critical fluctuations and not spin-orbit interaction.
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Bera et al. (2024) studied this question.
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