Cr adsorption effect of magnetic property of Fe/Cu(001)

Abstract

Epitaxial growth of iron on Cu(001) below 11 ML shows a perpendicular magnetic anisotropy. The sub-monolayer Or adsorbed fct Fe/Cu(001) have been investigated by x-ray absorption spectroscopy and x-ray magnetic circular dichroism (XMCD) to understand the element specific magnetic properties and the electronic states. It is found that the XMCD signal has been clearly observed in the Cr L2,3 edge, which indicates the anti-parallel magnetic moment in the adsorbed Or atom to that of the Fe layer. The smaller remnant magnetization for the larger amount of Or has been observed for both 2.5 and 7.4 ML Fe films, where their magnetizations disappear upon the 0.4 and 0.2 ML Or adsorption at 185 K, respectively. This behavior is turned out to be caused by the suppression of the Curie temperature. It is also found that the modification of the magnetic property for 7.4 ML Fe is similar to that for 2.5 ML © 2006 The Surface Science Society of Japan.