Title :
Magnetization reversal in nanostructured Co/Pt multilayer dots and films
Author :
Thielen, M. ; Kirsch, S. ; Weinforth, H. ; Carl, A. ; Wassermann, E.F.
Author_Institution :
Tieftemperaturphys., Gerhard-Mercator-Univ. GH Duisburg, Germany
fDate :
7/1/1998 12:00:00 AM
Abstract :
We report on the magnetic properties of large scale periodic magnetic nanostructures designed as dot-arrays with periodicity ranging between 300 nm and 1100 nm, consisting of Co/Pt multilayer dots with respective diameters ranging between 230 nm and 740 nm. The nanostructures are fabricated by using optical interference lithography allowing for large area (cm2) fabrication. The Co/Pt multilayer dots show a pronounced out-of-plane magnetic anisotropy. The magnetic properties are determined from magneto-optical Kerr effect measurements in polar geometry and results are compared to respective continuous Co/Pt multilayer thin films. The micromagnetic properties of both, films and nanostructures are investigated with magnetic force microscopy allowing for the application of an external perpendicular magnetic field of up to B=0.15 T
Keywords :
Kerr magneto-optical effect; cobalt; ferromagnetic materials; magnetic anisotropy; magnetic force microscopy; magnetic multilayers; magnetic thin films; magnetisation reversal; nanostructured materials; photolithography; platinum; 300 to 1100 nm; Co-Pt; Co/Pt multilayer dots; dot-arrays; external perpendicular magnetic field; films; large area fabrication; large scale periodic magnetic nanostructures; magnetic force microscopy; magnetic properties; magnetization reversal; magneto-optical Kerr effect; micromagnetic properties; nanostructured Co/Pt multilayer dots; nanostructures; optical interference lithography; out-of-plane magnetic anisotropy; periodicity; polar geometry; Geometrical optics; Large-scale systems; Magnetic anisotropy; Magnetic field measurement; Magnetic films; Magnetic multilayers; Magnetic properties; Magnetization reversal; Nanostructures; Perpendicular magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
