Contesting results for magnetic moments in nickel thin films

被引：24

作者：

Ernst, A ^{[1
]}

van der Laan, G ^{[1
]}

Temmerman, WM ^{[1
]}

Dhesi, SS ^{[1
]}

Szotek, Z ^{[1
]}

机构：

[1] SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.62.9543

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on Korringa-Kohn-Rostoker Green's function calculations for the ground-state moments of ultrathin Ni films on Cu(001) and on four monolayers (ML) Co/Cu(001). The calculations for Ni/Cu(001) show a slight enhancement of the Ni magnetic moment at the surface but a large reduction of the Ni magnetic moment at the Cu interface. The number of d holes at the surface and interface shows a small reduction. However, for Co/Cu(001) the calculation gave only a slightly decreased interface magnetic moment. For Ni on a ferromagnetic substrate, such as 4 ML Co/Cu(001), no reduction of the magnetic moment occurs, so that Ni at the interface retains its bulk value. These results are in contradiction with recent experimental results obtained using x-ray magnetic circular dichroism on ferromagnetic Ni films grown epitaxially on ultrathin films of Co. For decreasing film thickness, the number of holes and the magnetic moment show a gradual decrease.

引用

页码：9543 / 9547

页数：5

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