Noble metal capping effects on the spin-reorientation transitions of Co/Ru(0001)

被引：24

作者：

El Gabaly, Farid ^{[1
,2
]}

McCarty, Kevin F. ^{[3
]}

Schmid, Andreas K. ^{[2
]}

de la Figuera, Juan ^{[1
,4
]}

Carmen Munoz, M. ^{[5
]}

Szunyogh, Laszlo ^{[6
]}

Weinberger, Peter ^{[7
]}

Gallego, Silvia ^{[5
]}

机构：

[1] Univ Autonoma Madrid, Ctr Microanal Mat, E-28049 Madrid, Spain

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[3] Sandia Natl Labs, Livermore, CA 94550 USA

[4] CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, Spain

[5] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

[6] Budapest Univ Technol & Econ, Inst Phys, Dept Theoret Phys, H-111 Budapest, Hungary

[7] Ctr Computat Nanosci, A-1010 Vienna, Austria

来源：

NEW JOURNAL OF PHYSICS | 2008年 / 10卷

关键词：

D O I：

10.1088/1367-2630/10/7/073024

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Thin films of Co/Ru(0001) are known to exhibit an unusual spin reorientation transition (SRT) coupled to the completion of Co atomic layers for Co thicknesses under four layers. By means of spin-polarized low-energy electron microscopy, we follow in real space the magnetization orientation during the growth of atomically thick capping layers on Co/Ru(0001). Capping with noble metal (Cu, Ag and Au) elements modifies the SRT depending on the Co and overlayer thickness and on the overlayer material, resulting in an expanded range of structures with high perpendicular magnetic anisotropy. The origin of the SRT can be explained in terms of ab initio calculations of the layer-resolved contributions to the magnetic anisotropy energy. Besides the changes in the SRT introduced by the capping, a quantitative enhancement of the magnetic anisotropy is identified. A detailed analysis of the interplay between strain and purely electronic effects allows us to identify the conditions that lead to a high perpendicular magnetic anisotropy in thin hcp Co films.

引用

页数：22

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