TY - JOUR
T1 - Magnetic structure in Fe/Sm-Co exchange spring bilayers with intermixed interfaces
AU - Liu, Yaohua
AU - Te Velthuis, S. G.E.
AU - Jiang, J. S.
AU - Choi, Y.
AU - Bader, S. D.
AU - Parizzi, A. A.
AU - Ambaye, H.
AU - Lauter, V.
PY - 2011/5/6
Y1 - 2011/5/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79961099584&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.83.174418
DO - 10.1103/PhysRevB.83.174418
M3 - Article
AN - SCOPUS:79961099584
SN - 1098-0121
VL - 83
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 17
M1 - 174418
ER -