Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
87 (2000), S. 2483-2489
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have performed composition depth profiles and other structural experiments on Gd/Co multilayers and bilayers. Analysis of Auger depth profiles indicates a strongly asymmetric diffusion, especially of Co into the Gd layers. In multilayers, it is found that Co diffuses throughout the Gd layers and forms a Gd1−xCox amorphous alloy (x=0.29–0.35) that is limited at nearly the eutectic composition (x=0.37). Therefore, if the Co layers are nominally not too thin ((approximately-greater-than)3 nm), the multilayer mainly comprises an amorphous layers of composition around Gd0.7Co0.3 and layers of pure Co. Thin Co layers (3–7 nm) present broad halos in x-ray diffraction scans at wave vectors characteristics of pure cobalt. Thick layers ((approximately-greater-than)10 nm) show crystalline peaks with a coherence size (ξ⊥) shorter than its own layer thickness, suggesting the existence of amorphous phases next to the interface. This can be explained by the growth of pure and amorphous Co up to a thickness of 2–4 nm on the amorphous Gd alloy seed, but further Co deposition consists of hcp crystalline grains. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.372207
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