Effect of using stencil masks made by focused ion beam milling on permalloy (Ni81Fe19) nanostructures

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DOIResolve DOI: http://doi.org/10.1088/0957-4484/24/11/115301
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TypeArticle
Journal titleNanotechnology
ISSN0957-4484
Volume24
Issue11
Article number115301
SubjectChemical compositions; Electron beam evaporation; Energy dispersive X ray spectroscopy; Focused ion beam milling; Kelvin probe force microscopy; Permalloy nanostructures; Silicon nitride membrane; Unintended consequences; Electron beams; Electron energy loss spectroscopy; Ion implantation; Magnetic force microscopy; Nanostructures; Nickel alloys; Silicon nitride; Transmission electron microscopy; X ray spectroscopy; Focused ion beams
AbstractFocused ion beam (FIB) milling is a common fabrication technique to make nanostencil masks which has the unintended consequence of gallium ion implantation surrounding milled features in silicon nitride membranes. We observe major changes in film structure, chemical composition, and magnetic behaviour of permalloy nanostructures deposited by electron beam evaporation using silicon nitride stencil masks made by a FIB as compared to stencil masks made by regular lithography techniques. We characterize the stenciled structures and both types of masks using transmission electron microscopy, electron energy loss spectroscopy, energy dispersive x-ray spectroscopy, magnetic force microscopy and kelvin probe force microscopy. All these techniques demonstrate distinct differences at a length scale of a 1-100 nm for the structures made using stencil mask fabricated using a FIB. The origin of these differences seems to be related to the presence of implanted ions, a detailed understanding of the mechanism however remains to be developed. © 2013 IOP Publishing Ltd.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Security and Disruptive Technologies
Peer reviewedYes
NPARC number21271839
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Record identifierbb4563cf-20ae-4c25-a510-74b225a72e28
Record created2014-04-23
Record modified2016-05-09
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