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Structure and Magnetism in Mo/Co Multilayers

  • C.L. Foiles (a1), M.R. Franklin and R. Loloee (a1)

Abstract

The magnetic and structural properties of Co in Mo/Co multilayers are an unresolved issue. Two independent studies report different structures for thicker Co layers in multilayers of comparable dimensions as well as significant differences in both the form and the layer thickness for a loss of ferromagnetism. Both studies base their structural claims on a limited number of Bragg lines. We have used x-ray diffraction, transmission electron diffraction, and EXAFS to probe the structure of Mo/Co multilayers having Co layer thicknesses from 4 to 63Å. Our structural and magnetic results for these samples are compared to those of the above studies and are contrasted with results for Mo/Fe multilayers having comparable dimensions.

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References

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[1] Sato, Noboru, J. Appl. Phys. 63, 3476 (1988).
[2] Wang, Y., Cui, F.Z., Li, W.Z. and Fan, Y.D., J. Magn.Magn.Mater. 102, 121 (1991).
[3] Sung, H-K., “Structural Changes and Their Effects upon the Properties of Ultrathin Fe Layers”, Ph.D. thesis, Michigan State University (1990); H-K. Sung, C.L. Foiles and T.I. Morrison, Bull. APS 36, 1045 (1991).
[4] Slaughter, J.M., Pratt, W.P. Jr, and Schroeder, P.A., Rev. Sci. Instrum. 60, 127 (1988).
[5] Jin, B.Y. and Ketterson, J.B., Adv. in Phys. 38, 189 (1989).
[6] Foiles, C.L., Metallur. Trans. 23A, 1105 (1992).

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