Title :
Magnetization reversal in granular nanowires
Author :
Forster, Hermann ; Schrefl, Thomas ; Dittrich, Rok ; Suess, Dieter ; Scholz, Werner ; Tsiantos, Vassilios ; Fidler, Josef ; Nielsch, Kornelius ; Hofmeister, Herbert ; Kronmuller, Helmut ; Fischer, Saskia
Author_Institution :
Vienna Univ. of Technol., Austria
fDate :
9/1/2002 12:00:00 AM
Abstract :
The switching process of granular Co nanowires is investigated using the finite element method. The wires have a diameter of 55 nm and a length of 1000 nm. Transmission electron microscopy (TEM) investigations show two different types of hcp-structured grains. For one, the c axis is randomly oriented in a plane perpendicular to the long axis of the wire, and the other has the c axis parallel to the long axis. The numerical results show that finite element micromagnetics can explain the influence of the microstructure in magnetic nanosystems.
Keywords :
cobalt; ferromagnetic materials; finite element analysis; granular materials; magnetic anisotropy; magnetic switching; magnetisation reversal; nanostructured materials; perpendicular magnetic anisotropy; transmission electron microscopy; 1000 nm; 55 nm; Co; Co-Al2O3; TEM; diameter; finite element method; finite element micromagnetics; granular nanowires; hcp-structured grains; hexagonally arranged porous-alumina templates; length; long axis; magnetic nanosystems; magnetization reversal; microstructure; numerical results; randomly oriented c axis; switching process; transmission electron microscopy; Finite element methods; Lattices; Magnetic anisotropy; Magnetization reversal; Magnetostatics; Micromagnetics; Nanowires; Perpendicular magnetic anisotropy; Superconducting magnets; Wire;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801958
