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Magneto-optical magnetometry of individual 30 nm cobalt nanowires grown by electron beam induced deposition
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Image of FIG. 1.
FIG. 1.

(a) Schematics of the EBID process; the inset shows a scanning electron microscopy image of a cobalt pillar array fabricated by EBID.

Image of FIG. 2.
FIG. 2.

(a) Scanning electron microscopy image showing the set of EBID cobalt structures, referred to as set 1 in Table I. (b) Schematic sketch of the MOKE microscope utilized in this study, including the two operation modes that it enables: magnetic domain imaging24 and local high resolution magnetometry.

Image of FIG. 3.
FIG. 3.

(a) Optical microscope image of the set 1 cobalt EBID structures, as acquired by the MOKE enabled microscope; the red dashed frame shows schematically the ROI selected to enclose the thinnest cobalt line, which is only 30 nm wide and barely visible here. (b) Single shot MOKE hysteresis loop signal using a ROI as indicated in panel (a) for the W = 30 nm wide wire. (c) Same as in panel (b), but for the W = 55 nm wide wire.

Image of FIG. 4.
FIG. 4.

Scanning electron microscopy images of cobalt nanowires with widths of 30 nm (a), 55 nm (b), and 115 nm (c) and the corresponding magnetization hysteresis loops as determined by means of MOKE magnetometry. Each loop is an average of 9 measurements.


Generic image for table
Table I.

Deposition conditions, corresponding compositions, and dimensions of EBID grown cobalt structures.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magneto-optical magnetometry of individual 30 nm cobalt nanowires grown by electron beam induced deposition