Inertial terms to magnetization dynamics in ferromagnetic thin films

2015/09/09 by Yi Li, Yunyun Li, Anne-Laure Barra +7 · 51 citations
Engineering · Materials Science · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #Condensed matter physics #Dynamics (music) #Ferromagnetic resonance #Ferromagnetism #Inertial frame of reference #Laser #Magnetic Properties and Applications #Magnetic field #Magnetic properties of thin films #Magnetization #Magnetization dynamics #Materials science #Optics #Physics #Picosecond #Quantum mechanics #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.92.140413

published in Physical Review B 92(14) (American Physical Society) · 11 pages, 3 figures

arxiv created 2015/09/09 · openalex publication_date 2015/10/21 · arxiv updated 2016/01/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

Inertial magnetization dynamics have been predicted at ultrahigh speeds, or frequencies approaching the inverse Drude scattering time, in ferromagnetic metals. Here, we identify inertial terms to magnetization dynamics in thin Ni₇₉Fe₂₁ and Co films near room temperature. Effective magnetic fields measured in high-frequency ferromagnetic resonance (115--345 GHz) show an additional stiffening term which is quadratic in frequency and \ensuremath∼80 mT at the high-frequency limit of our experiment. Our results extend understanding of magnetization dynamics at picosecond time scales.

Citations

• Magnetization dynamics, gyromagnetic relation, and inertial effects
• Classics in Magnetics A Phenomenological Theory of Damping in Ferromagnetic Materials

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