X-Ray Analysis of Oxygen-induced Perpendicular Magnetic Anisotropy in Pt/Co/AlOx trilayer
Aur\'elien Manchon (SPINTEC), Stefania Pizzini (NEEL), Jan Vogel, (NEEL), Vojteh Uhlir (NEEL), Lucien Lombard (SPINTEC), Clarisse Ducruet, (SPINTEC), St\'ephane Auffret (SPINTEC), Bernard Rodmacq (SPINTEC), Bernard, Dieny (SPINTEC), Michael Hochstrasser, Giancarlo Panaccione
TL;DR
This study uses X-ray spectroscopy to explore how annealing-induced oxidation at the Co/AlOx interface enhances perpendicular magnetic anisotropy in Pt/Co/AlOx trilayers, revealing the microscopic structural changes involved.
Contribution
It demonstrates that annealing increases interfacial oxidation, which correlates with enhanced perpendicular magnetic anisotropy, providing insights into interface engineering for magnetic properties.
Findings
Annealing modifies magnetic properties of Co layer.
Interfacial oxide content increases with annealing.
Enhanced perpendicular magnetic anisotropy linked to oxidation.
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.
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