2016/08/11 by Emrah Turgut, Albert Park, Kayla X. Nguyen +4
Engineering · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #Condensed matter physics #Ferromagnetism #Magnet #Magnetic field #Magnetic properties of thin films #Magnetization #Materials science #Micromagnetics #Microwave #Nanotechnology #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Spin wave #Spintronics #Thin film #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.95.134416
published as Phys. Rev. B 95, 134416 (2017) · 35 pages total in manuscript format, 5 figures, supporting information
arxiv created 2016/08/11 · openalex publication_date 2017/04/12 · arxiv updated 2017/04/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Although chiral magnetic materials have emerged as a potential ingredient in future spintronic memory devices, there are few comprehensive studies of magnetic properties in scalably grown thin films. We present growth, systematic physical and magnetic characterization, and microwave absorption spectroscopy of B20 FeGe thin films. We also perform micromagnetic simulations and apply analytical theory to understand the dynamical magnetic behavior of this material. We find magnetic resonance features in both the helical and field-polarized magnetic states, which are well explained by micromagnetic simulations and analytical calculations. In particular, we show the resonant enhancement of spin waves along the FeGe film thickness that has a wave vector matching the helical vector. Using our analytic model, we also describe the resonance frequency of a helical magnetic state in bulk materials and thin films, which depends strongly on its untwisting field. Our results pave the way for understanding and manipulating high frequency spin waves in thin-film chiral magnet FeGe near room temperature.