Fe Pt ∕ B 4 C multilayer thin films were deposited using magnetron sputtering with different boron carbide layer thicknesses. Experimental results suggest that the B4C layers effectively serve as spacers to separate the FePt layers, making the multilayer configuration stable even after film annealing at elevated temperatures. On the other hand, B and C are found to incorporate into the FePt layer, which is responsible for the FePt grain growth confinement and grain separation, and eventually affects the magnetic properties of the composite film.
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Zhou et al. (2007) studied this question.
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