Abstract
Utilizing X-ray magnetic circular dichroism spectra the thickness effect on spin moment is examined in amorphous Co0.9Fe0.1films fabricated by RF magnetron sputtering. As film thickness increases from 5nm to 50nm, the variations of spin moments for Fe is a gradual decrease from 1.87μB to 1.70μB, while for Co it increases from 1.41μB to 1.69μB monotonously. Based on magnetic dead layer (MDL) model, the above changes are well explained, and the thickness of MDL, 0.83 nm, is estimated as well. That is not changed with increasing CoFe layer thickness.
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