Physics – Condensed Matter – Materials Science
Scientific paper
2010-12-22
Physics
Condensed Matter
Materials Science
16 pages, 6 figures and 1 table
Scientific paper
10.1103/PhysRevB.83.174418
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.
Ambaye Haile
Bader Samuel D.
Choi Yemon
Jiang Shao-Jian
Lauter Valeria
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