Visualizing modified spin-wave wavefronts near magnetic defects and domains using nitrogen-vacancy centers

• URL: http://arxiv.org/abs/2607.06941v1
• Date: Wed, 08 Jul 2026 03:10:44 GMT
• Title: Visualizing modified spin-wave wavefronts near magnetic defects and domains using nitrogen-vacancy centers
• Abstract summary: We employ scanning nitrogen-vacancy center spectroscopy to achieve visualization of spin waves in two archetypical magnetic films.<n>We reveal a wavelength-dependent spin-wave filtering effect near point-like magnetic scatterers and a modified spin wavefront in antiferromagnetically coupled stripe domains.
• Score: 19.001088687516276
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Direct, real-space imaging of spin-wave propagation and wavefronts in magnetic materials is crucial for advancing both fundamental understanding of spin dynamics and the development of functional devices. This, however, remains a significant challenge, especially in materials with complex magnetic characteristics at the nanoscale. Here, we employ scanning nitrogen-vacancy center spectroscopy to achieve visualization of spin waves in two archetypical magnetic films: yttrium-iron-garnet and lanthanum strontium manganese oxide. We reveal a wavelength-dependent spin-wave filtering effect near point-like magnetic scatterers and a modified spin wavefront in antiferromagnetically coupled stripe domains. The spin-wave characteristics are explained using micromagnetic simulations and analytical calculations. These findings point to possible fine control of spin-wave propagation near complex magnetic structures and extend the scope of spin-wave imaging based on nitrogen-vacancy centers beyond uniform magnets.

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