Title :
Magnetic properties of Fe microstructures with focused ion beam-fabricated nano-constrictions
Author :
Roshchin, Igor V. ; Yu, Jun ; Kent, Andrew D. ; Stupian, Gary W. ; Leung, Martin S.
Author_Institution :
Dept. of Phys., New York Univ., NY, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
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 μm-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
Keywords :
Kerr magneto-optical effect; crystal microstructure; ferromagnetic materials; ion beam effects; iron; magnetic thin films; nanostructured materials; photolithography; 2 to 20 nm; 25 nm; 3 nm; 40 to 120 nm; Fe; Fe microstructures; demagnetization factor; epitaxial (110) bcc Fe films; focused ion beam-fabricated nano-constrictions; magnetic properties; magneto-optic Kerr effect; photolithography; Fabrication; Ion beams; Iron; Lithography; Magnetic films; Magnetic force microscopy; Magnetic properties; Magnetooptic effects; Microstructure; Wire;
Journal_Title :
Magnetics, IEEE Transactions on
