Research Papers in Physics and Astronomy


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Published in Journal of Magnetism and Magnetic Materials 286 (February 2005), pp. 301–305; in “Proceedings of the 5th International Symposium on Metallic Multilayers”; doi 10.1016/j.jmmm.2004.09.142 Copyright © 2004 Elsevier B.V. Used by permission.


We have studied the magnetic properties of Au (2 nm)/Co50Pt50 (3 nm)/Au (2 nm) multilayer films prepared on amorphous Al2O3/Si and (0 0 1) MgO substrates. The as-deposited films on both substrates are magnetically soft with an FCC structure and exhibit a perpendicular anisotropy. After annealing at 500 °C, the sample on the Al2O3/Si substrate has become magnetically isotropic but the sample on the MgO substrate still has perpendicular anisotropy with FCT structure. This film deposited on the MgO substrate did not show a strong perpendicular anisotropy due to the diffusion of the Au and the (1 1 1) nucleation of initial Au layer. We can obtain a perpendicular anisotropy in the multilayer films without an initial Au layer on a (0 0 1) MgO substrate. After annealing at 400 °C, these films have L10 phase with (0 0 1) texture and strong perpendicular anisotropy.

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