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Baudelet, F., Lin, M.-T., Kuch, W., Meinel, K., Choi, B., Schneider, C. M., Kirschner, J.

Perpendicular anisotropy and spin reorientation in epitaxial Fe/Cu3Au(100) thin films
Physical Review B 51, (18),pp 12563-12578 (1995)
The in situ magneto-optical Kerr effect in both the polar and longitudinal geometry is studied for fcc Fe films on Cu/sub 3/Au(100) between 1.7 and 7.5 atomic layers thick. In films with Fe coverages less than 4 monolayers (ML) we observe a perpendicular magnetic anisotropy at temperatures below 300 K. At T=160 k the films exhibit a continuous spin reorientation transition from a perpendicular to an in-plane magnetization in a narrow thickness range between 3.5 and 4 ML. According to the thickness dependence of the Kerr signal the individual layers order ferromagnetically, in contrast to the findings in the Fe/Cu(100) system. Distinct changes in the magnetic properties as a function of coverage may be related to different states of the film structure and morphology.

ki-1995-p01