Ferromagnetic resonance of a YIG film in the low frequency regime

Seongjae Lee, Scott Grudichak, Joseph Sklenar, C. C. Tsai, Moongyu Jang, Qinghui Yang, Huaiwu Zhang, John B. Ketterson

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17 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number033905
JournalJournal of Applied Physics
Volume120
Issue number3
DOIs
StatePublished - Jul 21 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Lee, S., Grudichak, S., Sklenar, J., Tsai, C. C., Jang, M., Yang, Q., Zhang, H., & Ketterson, J. B. (2016). Ferromagnetic resonance of a YIG film in the low frequency regime. Journal of Applied Physics, 120(3), [033905]. https://doi.org/10.1063/1.4956435