X-ray analysis of oxygen-induced perpendicular magnetic anisotropy in Pt / Co / AlOx trilayers

Aurelien Manchon*, S. Pizzini, J. Vogel, V. Uhlíř, L. Lombard, C. Ducruet, S. Auffret, B. Rodmacq, B. Dieny, M. Hochstrasser, G. Panaccione

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

X-ray spectroscopy measurements have been performed on a series of Pt / Co / AlOx trilayers to investigate the role of Co oxidation in the perpendicular magnetic anisotropy of the Co / AlOx interface. It is observed that high temperature annealing modifies the magnetic properties of the Co layer, inducing an enhancement of the perpendicular magnetic anisotropy. The microscopic structural properties are analyzed via X-ray Absorption Spectroscopy, X-ray Magnetic Circular Dichroism and X-ray Photoelectron Spectroscopy measurements. It is shown that annealing enhances the amount of interfacial oxide, which may be at the origin of a strong perpendicular magnetic anisotropy.

Original languageEnglish (US)
Pages (from-to)1889-1892
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume320
Issue number13
DOIs
StatePublished - Jul 1 2008
Externally publishedYes

Keywords

  • Magnetic tunnel junctions
  • Perpendicular magnetic anisotropy
  • X-ray absorption spectroscopy (XAS)
  • X-ray magnetic circular dichroism (XMCD)
  • X-ray photoelectron spectroscopy (XPS)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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