Enhanced low-temperature interfacial gilbert damping in pt/yig/pt trilayer structures

Satya Prakash Pati, Yasushi Endo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The temperature-dependent magnetization dynamics in Pt/YIG/Pt trilayer structure is investigated by broadband ferromagnetic resonance (FMR) measurement method. The resonance field shifts toward a lower magnetic field with the decrease in temperature, and subsequently, a substantial increase in the FMR linewidth is obtained. This results in the enhancement of effective Gilbert damping ( $\alpha -{eff}$ ). The value of $\alpha -{eff}$ is enhanced from $1.1 \times 10^{-3}$ at 300 K to $5.0 \times 10^{-3}$ at 10 K. The origin of this enhancement in $\alpha -{eff}$ value may be interfacial in nature as it is prominent for the lower thickness of yttrium-iron-garnet layer at low temperature. Magnetic anisotropic dispersion at the interface may lead to the increase in inhomogeneous broadening with decreasing temperature.

Original languageEnglish
Article number8444695
JournalIEEE Transactions on Magnetics
Volume55
Issue number2
DOIs
Publication statusPublished - 2019 Feb

Keywords

  • Ferromagnetic resonance (fmr)
  • Gilbert damping
  • Magnetization dynamics
  • Yttrium-iron-garnet (yig)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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