Physics – Condensed Matter – Materials Science
Scientific paper
2009-03-15
Physics
Condensed Matter
Materials Science
accepted to Journal of Applied Physics
Scientific paper
10.1063/1.3077224
Magnetometry and neutron scattering have been used to study the magnetic properties of pressure graded Co/Pd multilayers. The grading of the multilayer structure was done by varying the deposition pressure during sputtering of the samples. Magnetic depth profiling by polarized neutron reflectometry directly shows that for pressure-graded samples, the magnetization changes significantly from one pressure region to the next, while control samples sputtered at uniform pressure exhibit essentially uniform magnetic depth profiles. Complementary magnetometry results suggest that the observed graded magnetic profiles are due in part to a decrease in saturation magnetization for regions deposited at progressively higher pressure. Increased deposition pressure is shown to increase coercivity, and for graded samples, the absence of discrete steps in the hysteresis loops implies exchange coupling among regions deposited at different pressures.
Borchers Julie A.
Davies Joseph E.
Kirby Brian J.
Liu Kaijian
Shull R. D.
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