Magnetic properties of Fe microstructures with focused ion beam-fabricated nano-constrictions

Studies of the magnetic properties of Fe microfabricated wires with a mechanically stable 40 to 120 nm-wide constriction produced with focused ion beam are reported. The 2 to 20 /spl mu/m-wide wires are fabricated by photolithography from 3 nm and 25 nm-thick epitaxial [110] bcc Fe films. This fabri...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2001-07, Vol.37 (4), p.2101-2103
Main Authors: Roshchin, I.V., Yu, J., Kent, A.D., Stupian, G.W., Leung, M.S.
Format: Article
Language:English
Subjects:
Applied sciences
Constrictions
Electronics
Exact sciences and technology
Fabrication
Ion beams
Iron
Lithography
Magnetic films
Magnetic force microscopy
Magnetic properties
Magnetism
Magnetooptic effects
Micro- and nanoelectromechanical devices (mems/nems)
Microstructure
Nanocomposites
Nanomaterials
Nanostructure
Preserves
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Wire
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Summary:Studies of the magnetic properties of Fe microfabricated wires with a mechanically stable 40 to 120 nm-wide constriction produced with focused ion beam are reported. The 2 to 20 /spl mu/m-wide wires are fabricated by photolithography from 3 nm and 25 nm-thick epitaxial [110] bcc Fe films. This fabrication method appears to preserve the magnetic properties of the constriction. The structures are studied by MFM and by magneto-optic Kerr effect (MOKE) measurements. The ratio of the wire linewidth to its thickness determines the demagnetization factor and, therefore, influences the coercivity of the wire. Both a step in the width of the wire and a nano-constriction in the middle of the wire are found to be domain wall (DW) pinning centers.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.951066