2015/11/24 by Seongjae Lee, Scott Grudichak, Joseph Sklenar +5 · 54 citations
Engineering · Materials Science · Physics and Astronomy · #Anisotropy #Ferromagnetic resonance #Ferromagnetism #Magnetic anisotropy #Magnetic field #Magnetic properties of thin films #Magnetization #Magneto-Optical Properties and Applications #Magnetocrystalline anisotropy #Multiferroics and related materials #Saturation (graph theory) #Yttrium iron garnet #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.4956435
published in Journal of Applied Physics 120(3) (American Institute of Physics)
arxiv created 2015/11/24 · openalex created_date 2016/06/24 · openalex publication_date 2016/07/21 · arxiv updated 2016/08/03 · openalex updated_date 2026/08/06
An improved method for characterizing the magnetic anisotropy of films with cubic symmetry is described and is applied to an yttrium iron garnet (111) film. Analysis of the ferromagnetic resonance (FMR) spectra performed both in-plane and out-of-plane from 0.7 to 8 GHz yielded the magnetic anisotropy constants as well as the saturation magnetization. The field at which FMR is observed turns out to be quite sensitive to anisotropy constants (by more than a factor ten) in the low frequency (<2 GHz) regime, and when the orientation of the magnetic field is nearly normal to the sample plane; the restoring force on the magnetization arising from the magnetocrystalline anisotropy fields is then comparable to that from the external field, thereby allowing the anisotropy constants to be determined with greater accuracy. In this region, unusual dynamical behaviors are observed such as multiple resonances and a switching of FMR resonance with only a 1° change in field orientation at 0.7 GHz.