Molecular dynamics simulations on the direct sputtering of Al 2O3 insulating film in a magnetic tunneling junction

Ming Horng Su, Chung Yi Lin, Shi Hao Wang, Chi Chuan Hwang

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1 Citation (Scopus)


The molecular dynamics (MD) simulation is used to study the direct deposition of aluminum-oxide (Al2O3) to grow an insulating thin film on cobalt substrate in a magnetic tunneling junction (MTJ). The direct deposition of Al2O3 may produce a very thin film with very smooth surface and form an averagely oxidized insulator. A high magnetoresistance ratio is desired in an MTJ device, so that smooth surface and good structural integrity for the insulating thin film is anticipated. The MD simulation is an effective way in determining optimal processing parameters that can be used to fabricate high-quality MTJ devices. The Buckingham and many-body tight-binding potentials are applied in the MD simulations for different interactions between particles. The effects of the cluster size and the incident energy on the thin film's surface morphology and Al2O3 purity are investigated. Some optimal parameters that could be used as the reference for practical processing purposes are derived.

Original languageEnglish
Pages (from-to)263-272
Number of pages10
JournalJournal of Magnetism and Magnetic Materials
Issue number3
Publication statusPublished - 2004 Jun

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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