Enhancement of magnetic moment of iron atoms in the Fe/Au nanomultilayers

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Abstract
Fe/Au multilayers were prepared by alternative vapor deposition. The periodicity, thickness, chemical composition, microstructure, and the magnetic moment of the films were determined and measured by various methods. The magnetic moment per Fe atom in Fe/Au multilayers was considerably enhanced when the Fe layer thickness was thinner than 8 nm and it was up to 2.59 μB, i.e., about 1.2 times of that of bulk Fe, at an Fe layer thickness of 4.5 nm. The experimental results also revealed that as the thickness of the Fe layer decreased, there was an increasing tendency towards perpendicular magnetization in the Fe/Au multilayers. The possible mechanism responsible for the modification of magnetic properties is also discussed.