A magnetic force microscopy study of the magnetic reversal of a single Fe nanowire

作者:Wang T*; Wang Y; Fu Y; Hasegawa T; Li F S; Saito H; Ishio S
来源:Nanotechnology, 2009, 20(10): 105707.
DOI:10.1088/0957-4484/20/10/105707

摘要

The magnetization reversal properties of a single 60 nm diameter Fe nanowire were investigated with an in-field magnetic force microscope (MFM). MFM images were observed in a successively decreasing applied field, at various angles between the applied field and the nanowire axis. The results show that the magnetization undergoes a sharp reversal at various angles. When the applied field deviates from the nanowire axis, before complete magnetization reversal, a coherent rotation of magnetic moments inside the nanowire and a stable vortex state at the end of the nanowire are exhibited. The angle dependence of the switching field can be closely described by a curling model, despite the fact the magnetization reversal process is not identical to this model.