Article ID Journal Published Year Pages File Type
1555054 Superlattices and Microstructures 2008 6 Pages PDF
Abstract
Focused ion-beam milling has been employed to structure magnetic nanoelements from 20 nm thick films of permalloy (Ni81Fe19). Rectangles are patterned into permalloy thin films grown on Si substrates by means of electron-beam lithography and focused ion-beam (FIB) milling down to 100 nm dimensions. In this study, we analyse the effect of the FIB milling parameters (ion current, spot size, dose) on the resulting magnetic domain structures. The ion currents have been varied between 10 pA and 10 000 pA; the dose of the ion beam used for milling was varied in order to achieve the best definition for the milled areas. The resulting edges of the permalloy structures are characterized by means of AFM. We find that a small ion dose does not affect the resulting magnetic domain patterns in the structures, so FIB milling can be applied to create high-quality permalloy nanostructures.
Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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