The perpendicular magnetic anisotropy of CoPt/Au multilayer films

T. Yokota, L. Gao, R. Zhang, L. Nicholl, M. L. Yan, D. J. Sellmyer, S. H. Liou

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

We have studied the magnetic properties of Au (2 nm)/Co 50Pt 50 (3 nm)/Au (2 nm) multilayer films prepared on amorphous Al 2O 3/Si and (0 0 1) MgO substrates. The as-deposited films on both substrates are magnetically soft with an FCC structure and exhibit a perpendicular anisotropy. After annealing at 500°C, the sample on the Al 2O 3/Si substrate has become magnetically isotropic but the sample on the MgO substrate still has perpendicular anisotropy with FCT structure. This film deposited on the MgO substrate did not show a strong perpendicular anisotropy due to the diffusion of the Au and the (1 1 1) nucleation of initial Au layer. We can obtain a perpendicular anisotropy in the multilayer films without an initial Au layer on a (0 0 1) MgO substrate. After annealing at 400°C, these films have L1 0 phase with (0 0 1) texture and strong perpendicular anisotropy.

Original languageEnglish (US)
Pages (from-to)301-305
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume286
Issue numberSPEC. ISS.
DOIs
StatePublished - Feb 1 2005

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Keywords

  • CoPt
  • L1 phase
  • Ordering temperature
  • Perpendicular anisotropy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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