Landau-Lifshitz-Gilbert micromagnetic simulation on spin transfer torque efficiency of sub-30nm perpendicular magnetic tunnel junctions with etching damage

Kenchi Ito, Satoshi Ohuchida, Masakazu Muraguchi, Tetsuo Endoh

研究成果: Article査読

4 被引用数 (Scopus)

抄録

The threshold current density Jc0, effective anisotropy field Heff, and the spin transfer torque (STT) efficiency of magnetic tunnel junctions with perpendicular anisotropy (p-MTJs) with the free layer diameter d from 10 to 30nm was evaluated when etching degraded the saturation magnetization Ms and/or anisotropic energy Ku of the ferromagnetic layers with thickness of 1 to 3 nm around the pillar, using Landau-Lifshitz- Gilbert (LLG) micro-magnetic simulation. The STT efficiency for MTJs with only Ms reduction increased with a decrease in d, which reproduces the experimental trend. Jc0 and Heff for MTJs with only Ku reduction dramatically decreased even when the thickness of the damaged region is only 1 nm. The thickness of the damaged region had a large influence on Jc0 and Heff for MTJs with either Ms or Ku reduction.

本文言語English
論文番号04DM01
ジャーナルJapanese journal of applied physics
54
4
DOI
出版ステータスPublished - 2015 4 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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