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arXiv · 0712.1905

Analysis of anisotropy crossover due to oxygen in Pt/Co/MOx trilayer

Aurélien Manchon·Clarisse Ducruet·Lucien Lombard·Stéphane Auffret·Bernard Rodmacq·Bernard Dieny·Stefania Pizzini·Jan Vogel·Vojtech Uhlir·Michael Hochstrasser·Giancarlo Panaccione
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Abstract

Extraordinary Hall effect and X-ray spectroscopy measurements have been performed on a series of Pt/Co/MOx trilayers (M=Al, Mg, Ta...) 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 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.

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Aurélien Manchon, Clarisse Ducruet, Lucien Lombard, Stéphane Auffret, Bernard Rodmacq, Bernard Dieny, Stefania Pizzini, Jan Vogel, Vojtech Uhlir, Michael Hochstrasser, Giancarlo Panaccione. 2007-12-12. Analysis of anisotropy crossover due to oxygen in Pt/Co/MOx trilayer. https://doi.org/10.1063/1.2969711

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