STRUCTURAL STUDIES IN CO ZR MULTILAYERS USING NMR/

A structural analysis in the as-deposited Co-x/Zr-y (5 < x < 40 nm, 5 < y < 80 nm) multilayers prepared by rf sputtering has been performed by means of Co-59 NMR spectroscopy. Three main magnetic contributions are found in all samples: (1) Co/Zr interface consisting of CoZr amorp hous alloy with an average Zr concentration of 20%; (2) bulk crystalli ne Co, which has a general tendency to crystallize in an fee structure with a significant amount of hcp stacking faults; (3) grain boundarie s within bulk Co revealing the presence of isolated Zr atoms.