期刊
APPLIED SURFACE SCIENCE
卷 257, 期 17, 页码 7427-7431出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2011.02.109
关键词
Co/Pt multilayers; Structural; Magnetic properties
类别
资金
- National Natural Science Foundation of China [10904110]
- Tianjin Natural Science Foundation of china [10JCYBJC01600]
- College Science and Technology Development Foundation of Tianjin [20060902]
- Tianjing Key Subject for Materials Physics and Chemistry
- Beijing Synchrotron Radiation Laboratory
[Co(30 angstrom)/Pt(x angstrom)](20) multilayers with the Pt layer thicknesses varying from 5 angstrom to 20 angstrom were characterized structurally by high angle X-ray diffraction, X-ray reflectivity, X-ray absorption spectroscopy and magnetically by X-ray magnetic circular dichroism. It is found that the structure and magnetic properties of Pt have a strong correlation with the Pt layer thickness. The 20 angstrom thickness Pt layer is not almost influenced by the adjacent Co layer and the nearest neighbors are dominated by Pt-Pt shells. With decreasing Pt layer thickness, the nearest neighbors are gradually dominated by Pt-Co shells and the Pt-Co intermixing regions also remarkable increase at the interfaces, especially for the 5 angstrom thickness Pt layer. The orbital and spin magnetic moments as well as the ratio m(orb)/m(spin) all decrease systematically with increasing Pt layer thickness, indicating that the interface atoms are polarized by direct Pt-Co hybridization, but that the adjacent layers are polarized by Pt-Pt interactions. (C) 2011 Elsevier B.V. All rights reserved.
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