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Magnetocrystalline and magnetoelastic constants determined by magnetization dynamics under static strain
J-Y Duquesne1, C Hepburn1, P Rovillain1
1Sorbonne Université, CNRS, Institut des Nanosciences de Paris (UMR 7588), 4 place Jussieu, 75252 Paris, France.
Summary
Magnetoelastic coupling in ferromagnets can be studied using strain. Researchers derived magnetization dynamics and showed material parameters are measurable via time-resolved Kerr experiments.
Area of Science:
- Physics
- Materials Science
- Condensed Matter Physics
Background:
- Magnetoelastic coupling is crucial for understanding ferromagnet behavior.
- Strain application can dynamically alter magnetization.
- Time-resolved experiments are key to observing these dynamics.
Purpose of the Study:
- To derive the time evolution of magnetization in ferromagnets under strain.
- To demonstrate that micromagnetic parameters can be extracted from experimental measurements.
- To link theoretical models with experimental observations.
Main Methods:
- Derivation of magnetization vector's time evolution.
- Analysis of magnetization dynamics induced by step-like strain.
- Utilizing time-resolved Kerr experiments for measurements.
Main Results:
- The study successfully derived the magnetization vector's time evolution.
- It was shown that micromagnetic parameters (anisotropy, magnetoelastic coupling) are derivable.
- Key measurable quantities include precession frequency, relaxation time, and phase lag.
Conclusions:
- Magnetization dynamics in ferromagnets under strain are theoretically modeled.
- Experimental measurement of precession frequency, relaxation time, and phase lag allows for derivation of material parameters.
- Time-resolved Kerr experiments are suitable for these measurements.
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