Detectability of coherent spin waves in 2D magnets with NV magnetometry

Determine whether changes in the time-averaged longitudinal magnetization induced by coherent spin-wave excitation in two-dimensional magnets produce sufficient signal strength for detection with nitrogen-vacancy magnetometry, given that spin-wave damping is unknown for most 2D magnets.

Background

NV magnetometry is a powerful, broadband probe of static and dynamic magnetism and has imaged spin waves in model magnets like YIG. Extending these techniques to 2D magnets would enable direct measurements of damping and interactions in reduced dimensionality.

Because 2D magnets produce weak stray fields and their spin-wave spectra are often high-frequency due to large anisotropies, signal magnitudes and detection bandwidth are critical unknowns, particularly when spin-wave damping is not yet quantified.