Influence of thermal annealing on the perpendicular magnetic anisotropy of Pt/Co/AlOx trilayers

B. Rodmacq*, Aurelien Manchon, C. Ducruet, S. Auffret, B. Dieny

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

113 Scopus citations

Abstract

The influence of thermal annealing on Pt/Co/AlOx trilayers has been investigated up to 450°C as a function of the plasma oxidation time of the AlOx layer. Both magnetic properties of the Co layer and transport properties are strongly modified upon annealing. The perpendicular magnetic anisotropy reaches very large values, while the Hall angle increases with annealing temperature. This study reveals that this trilayer system possesses tunable magnetic anisotropy properties, which can be controlled by varying either oxidation time or annealing temperature. These results are compared with those obtained on standard Pt/Co/Pt trilayers which show, on the contrary, a continuous degradation of their magnetic properties upon annealing.

Original languageEnglish (US)
Article number024423
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number2
DOIs
StatePublished - Jan 5 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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