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Magnetic X-Ray Circular Dichroism in Fe Co Pt Multilayers

Published online by Cambridge University Press:  15 February 2011

J. G. Tobin,
A. F. Jankowski,
G. D. Waddill and
P. A. Sterne
J. G. Tobin
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
A. F. Jankowski
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
G. D. Waddill
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
P. A. Sterne
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550University of California, Davis, CA 95616
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Abstract

Magnetic x-ray circular dichroism in x-ray absorption has been used to investigate the ternary multilayer system, Fe Co Pt. Samples were prepared by planar magnetron sputter deposition and carefully characterized, using a variety of techniques such as grazing-incidence and high-angle x-ray scattering, Auger depth profiling and cross-section transmission electron microscopy. As previously reported, the Fe9.5Å Pt9.5Å exhibits a large dichroism in the Fe 2p absorption. Interestingly while the Co9.5Å Pt9.5Å has no measurable dichroism, the Fe4.7Å Co4.7Å Pt9.5Å sample has a dichroism at both the Fe 2p and Co 2p absorption edges. These and other results will be compared to slab calculation predictions. Possible explanations will be discussed.

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