Abstract
Structures and magnetic properties of Co/Al multilayers prepared by means of planar magnetron sputtering were investigated. We compare the results with those of the previously reported films fabricated by electron-beam deposition. It is found that remarkable differences exist between the films synthesized by the two methods. For example, the sputtered multilayers show a transition from in-plane to out-of-plane magnetization at a crossover thickness of Co layer from 14 to 7 Å. For samples with tCo ≤ 6 Å, the Co layers were discontinuous. Formation of the CoAl compound in the samples has not been observed.
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