Study of growth and broadband FMR spectroscopy in PLD grown Y3Fe5O12/Gd3Ga5O12 thin films

S. Satapathy, R. P. Pant, K. K. Maurya

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We report the structural and magnetization dynamics of pulsed laser ablated Y3Fe5O12 (YIG) thin films grown on gadolinium gallium garnet (GGG[110]) substrate. The co-planar waveguide ferromagnetic resonance measurement was performed to study the thickness and inhomogeneity effect on damping constant. We also estimated the effective demagnetization ( 4 π M eff ) value which was lower than that of single-crystalline bulk YIG. A detailed line width analysis revealed the significant two-magnon scattering and inhomogeneity contribution to damping which varied for different thickness films. The Gilbert damping constant (α) of the grown film was found to be lowest in the case of 100 nm film (≈3 × 10−4), and the corresponding inhomogeneous broadening (ΔH O) was recorded to be 77 Oe. Further angular measurements on 100 nm thin film revealed the presence of strong uniaxial magnetic anisotropy field of 735 Oe at 10 GHz RF frequency.

Original languageEnglish
Article number435004
JournalJournal Physics D: Applied Physics
Volume55
Issue number43
DOIs
Publication statusPublished - 27 Oct 2022
Externally publishedYes

Keywords

  • broad band ferromagnetic resonance (FMR)
  • damping constant (α)
  • inhomogeneous broadening
  • line width
  • resonance field
  • uniaxial magnetic anisotropy constant (UMA)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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