Abstract

Multilayered films consisting of ultrathin Fe layers with spacer layers of other materials, such as Mg, Nd, or C, have been prepared by using vacuum deposition techniques. The properties of Fe layers have been investigated from57Fe Mossbauer spectroscopy. If the stacking is nonepitaxial, the structure of the Fe layers is amorphous as long as the thickness is less than a critical value. It is found that a structural transformation from amorphous to crystalline (bcc) generally takes place in the course of nonepitaxial film growth.

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