Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of the Annealing Conditions on the Ferromagnetic Resonance of YIG Thin Film Prepared on GGG Substrate

Gd3Ga5O12 기판위에 성장된 Y3Fe5O12 박막의 열처리 조건에 따른 강자성 공명 특성 연구

  • Lee, Yelim (Department of Materials Science and Engineering and Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Phuoc, Cao Van (Department of Materials Science and Engineering and Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Park, Seung-Young (Department of Materials Science, Korea Basic Science Institute) ;
  • Jeong, Jong-Ryul (Department of Materials Science and Engineering and Graduate School of Energy Science and Technology, Chungnam National University)
  • 이예림 (충남대학교 신소재공학과/에너지과학기술대학원) ;
  • ;
  • 박승영 (한국기초과학지원연구원 스핀공학물리연구팀) ;
  • 정종율 (충남대학교 신소재공학과/에너지과학기술대학원)
  • Received : 2015.10.06
  • Accepted : 2015.10.29
  • Published : 2015.12.27
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Abstract

In this study, we investigated the effect of annealing conditions on the ferromagnetic resonance(FMR) of yttrium iron garnet ($Y_3Fe_5O_{12}$, YIG) thin film prepared on gadolinium gallium garnet ($Gd_3Ga_5O_{12}$, GGG) substrate. The YIG thin films were grown by rf magnetron sputtering at room temperature and were annealed at various temperatures from 700 to $1000^{\circ}C$. FMR characteristics of the YIG thin films were investigated with a coplanar waveguide FMR measurement system in a frequency range from 5 to 20 GHz. X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS) were used to characterize the phase formation, crystal structure and composition of the YIG thin films. Field dependent magnetization curves at room temperature were obtained by using a vibrating sample magnetometer(VSM). The FMR measurements revealed that the resonance magnetic field was highly dependent on the annealing condition: the lowest FMR linewidth can be observed for the $800^{\circ}C$ annealed sample, which agrees with the VSM results. We also found that the Fe and O composition changes during the annealing process play important roles in the observed magnetic properties.

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References

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