Strong perpendicular anisotropy in Fe1-xCox alloy films epitaxially grown on mismatching Pd(001), Ir(001), and Rh(001) substrates

被引：84

作者：

Yildiz, F. ^{[1
]}

Przybylski, M. ^{[1
,2
]}

Ma, X. -D. ^{[1
]}

Kirschner, J. ^{[1
]}

机构：

[1] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany

[2] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, PL-30059 Krakow, Poland

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 06期

关键词：

buffer layers; cobalt alloys; iron alloys; lattice constants; magnetic anisotropy; magnetic thin films; magnetisation; MAGNETIC DEAD LAYERS; MULTILAYERS; TRANSITION; MOMENT;

D O I：

10.1103/PhysRevB.80.064415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In tetragonally distorted Fe1-xCox alloy films grown epitaxially on Pd(001), Ir(001), and Rh(001) substrates, a strong uniaxial anisotropy and an easy-magnetization axis perpendicular to the film plane are observed. The strongest perpendicular anisotropy is achieved when the Fe0.5Co0.5 films are grown on Rh(001) (c/a=1.24) and it systematically decreases for Ir(001) (c/a=1.18) and Pd(001) (c/a=1.13) substrates in agreement with the theoretical predictions. For the Fe1-xCox films grown on Rh(001) the easy-magnetization axis remains perpendicular up to 15 ML in a broad composition range even at room temperature, which is different from the Fe1-xCox films grown on Pd(001) showing a perpendicular easy-magnetization axis only for x=0.5 and only at low temperature. By growing a pseudomorphic buffer layer of Pd on Rh(001) it is shown that the substrate lattice constant and the resulting film distortion are the factors which are decisive for the uniaxial magnetic anisotropy of the Fe1-xCox films of the same composition.

引用

页数：6

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