Magnetic structure in Fe/Sm-Co exchange spring bilayers with intermixed interfaces

被引：35

作者：

Liu, Yaohua ^{[1
]}

Velthuis, S. G. E. Te ^{[1
]}

Jiang, J. S. ^{[1
]}

Choi, Y. ^{[1
]}

Bader, S. D. ^{[1
]}

Parizzi, A. A. ^{[2
]}

Ambaye, H. ^{[2
]}

Lauter, V. ^{[2
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 17期

关键词：

MEDIA;

D O I：

10.1103/PhysRevB.83.174418

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The depth profile of the intrinsic magnetic properties in an Fe/Sm-Co bilayer fabricated under nearly optimal spring-magnet conditions was determined by complementary studies of polarized neutron reflectometry and micromagnetic simulations. We found that at the Fe/Sm-Co interface, the magnetic properties change gradually at the length scale of 8 nm. In this intermixed interfacial region, the saturation magnetization and magnetic anisotropy are lower and the exchange stiffness is higher than values estimated from the model based on a mixture of Fe and Sm-Co phases. Therefore, the intermixed interface yields superior exchange coupling between the Fe and Sm-Co layers, but at the cost of average magnetization.

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页数：7

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