期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 320, 期 13, 页码 1889-1892出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2008.02.131
关键词
X-ray photoelectron spectroscopy (XPS); X-ray magnetic circular dichroism ( XMCD); X-ray absorption spectroscopy (XAS); magnetic tunnel junctions; perpendicular magnetic anisotropy
X-ray spectroscopy measurements have been performed on a series of Pt/Co/AlO(x) trilayers to investigate the role of Co oxidation in the perpendicular magnetic anisotropy of the Co/AlO(x) 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. (C) 2008 Elsevier B. V. All rights reserved.
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