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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Self-Modulation Instability in High Power Ferromagnetic Resonance of BiYIG Nanodisks
I Ngouagnia Yemeli1, S Perna2, D Gouéré3
1CEA, SPEC, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France.
Physical Review Letters
|August 18, 2025
Summary
High power ferromagnetic resonance in BiYIG nanodisks shows magnetization self-modulation. This unstable dynamic behavior, analyzed via normal modes, leads to phenomena like bistability, suggesting potential for novel information processing.
Area of Science:
- * Condensed matter physics
- * Spintronics
- * Nonlinear dynamics
Background:
- * Ferromagnetic resonance (FMR) is crucial for understanding magnetic materials.
- * Perpendicularly magnetized nanostructures exhibit complex magnetic behaviors.
- * BiYIG (Bismuth Iron Garnet) offers unique magnetic properties for advanced applications.
Purpose of the Study:
- * Investigate high power FMR in BiYIG nanodisks.
- * Analyze the self-modulation of dynamic magnetization.
- * Explore potential applications in unconventional information processing.
Main Methods:
- * High power ferromagnetic resonance measurements.
- * Full micromagnetic simulations.
- * Normal mode analysis.
- * Two-tone spectroscopy.
Main Results:
- * Observed strong magnetization saturation and FMR line broadening.
- * Identified self-modulation of dynamic magnetization as the cause.
- * Normal mode analysis revealed increased mode involvement and nonlinear couplings.
- * Predicted and experimentally confirmed Suhl-like instability and bistability.
Conclusions:
- * Nonlinear dynamics in BiYIG nanodisks can be modeled using a few coupled normal modes.
- * Experimental evidence supports self-modulation and bistable dynamics.
- * Findings suggest potential for using complex magnetic dynamics in nanostructures for information processing.
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