Spatial and chemical interface asymmetry in Fe/MgO/Fe(001) heterostructures

被引：8
作者：
Palomares, FJ [1 ]
Munuera, C
Boubeta, CM
Cebollada, A
机构：
[1] CSIC, Inst Ciencia Mat Madrid, Madrid 28049, Spain
[2] CSIC, CNM, Inst Microelect Madrid, Madrid 28760, Spain
来源：
JOURNAL OF APPLIED PHYSICS | 2005年 / 97卷 / 03期
关键词：
D O I：
10.1063/1.1847718
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The chemical nature of the different interfaces and possible segregation effects are studied in fully epitaxial Fe/MgO/Fe (001) oriented heterostructures fabricated by combined sputtering plus laser ablation deposition techniques. Auger electron spectroscopy depth profiling experiments showed that the interfaces of the MgO spacer with the Fe layers are different, the inner MgO/Fe being spatially broader and with an FeO interlayer, while that of the outer Fe/MgO is spatially narrower with no evidence of FeO formation. This spatial and chemical asymmetry is interpreted in terms of the different deposition procedures, which affect the formation of both interfaces. No Fe segregation in the MgO layers or MgO segregation in the Fe films is observed. (C) 2005 American Institute of Physics.
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