Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9809582 | Surface and Coatings Technology | 2005 | 4 Pages |
Abstract
L10 ordered FePt films of (200) or (001) preferred orientations with longitudinal or perpendicular anisotropy have been prepared by DC magnetron sputtering. The fct-FePt film exhibits (200) preferred orientation at the base pressure of 4Ã10â6 Torr. As the base pressure is decreased (below 9Ã10â7 Torr), the fct-FePt films exhibit (001) preferred orientation. When the CrRu underlayer thickness decreases from 80 to 30 nm, an improved CrRu (002) and fct-FePt (001) orientation is obtained. Ag doping in FePt film also promotes the growth of fct-FePt (200) orientation and suppresses the growth of fct-FePt (001) orientation. As the thickness of CrRu underlayer decreases to 15 and 8 nm, the orientation of CrRu (002) deteriorates, and FePt-Ag composite films with an improved fct (200) orientation were obtained. It is considered that the changes in relative surface energy due to the introduction of atmospheric components, Ag doping and epitaxial growth energy arising from the lattice misfit between FePt films and CrRu underlayer play an important role in controlling the crystallographic orientation of FePt films on the CrRu underlayer.
Related Topics
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Authors
B.C. Lim, J.S. Chen, J.P. Wang,