Analysis of oxygen induced anisotropy crossover in Pt/Co/MOx trilayers

journal article - other

English

Extraordinary Hall effect and x-ray spectroscopy measurements have been performed on a series of Pt/Co/MOx trilayers (M=Al, Mg, Ta, etc.) in order to investigate the role of oxidation in the onset of perpendicular magnetic anisotropy at the Co/MOx interface. It is observed that varying the plasma oxidation time modifies the magnetic properties of the Co layer, inducing a magnetic anisotropy crossover from in plane to out of plane. We focused on the influence of plasma oxidation on Pt/Co/AlOx perpendicular magnetic anisotropy. The interfacial electronic structure is analyzed via x-ray photoelectron spectroscopy measurements. It is shown that the maximum of out-of-plane magnetic anisotropy corresponds to the appearance of a significant density of Co-O bondings at the Co/AlOx interface. (C) 2008 American Institute of Physics.

MAGNETIC TUNNEL-JUNCTIONS; MAGNETOCRYSTALLINE ANISOTROPY; PERPENDICULAR ANISOTROPY; AU MULTILAYERS; INTERFACE; OXIDATION; CO; MAGNETORESISTANCE; MONOLAYERS; INPLANE

MANCHON, A.; DUCRUET, C.; LOMBARD, L.; AUFFRET, S.; RODMACQ, B.; DIENY, B.; PIZZINI, S.; VOGEL, J.; UHLÍŘ, V.; HOCHSTRASSER, M.; PANACCIONE, G.

2008

15. 8. 2008

0021-8979

Journal of Aplied Physics

104

4

United States of America

043914-1

043914-7

7