Title :
Asymmetric Hysteresis of Néel Caps in Flux-Closure Magnetic Dots
Author :
Fruchart, Olivier ; Rougemaille, Nicolas ; Bendounan, Azzedine ; Toussaint, Jean-Christophe ; Belkhou, Rachid ; Tian, Yuan ; Yu, Hyeonseung ; Cheynis, Fabien ; Masseboeuf, Aurélien ; Bayle-Guillemaud, Pascale ; Marty, Alain
Author_Institution :
Inst. Neel, Univ. Joseph Fourier, Grenoble, France
fDate :
6/1/2010 12:00:00 AM
Abstract :
We investigated with XMCD-PEEM magnetic imaging the magnetization reversal processes of Neel caps inside Bloch walls in self-assembled, micron-sized Fe(110) dots with flux-closure magnetic state. In most cases these magnetic processes are symmetric in field, as expected. However, some dots show pronounced asymmetric behaviors. Micromagnetic simulations suggest that the geometrical features (and their asymmetry) of the dots strongly affect the switching mechanism of the Neel caps.
Keywords :
iron; magnetic domain walls; magnetic hysteresis; micromagnetics; self-assembly; Bloch walls; Fe; Neel cap asymmetric hysteresis; XMCD-PEEM magnetic imaging; flux-closure magnetic dots; flux-closure magnetic state; magnetic processes; magnetization reversal processes; micromagnetic simulations; micronsized Fe(110) dots; self-assembly; switching mechanism; Magnetic cores; Magnetic domain walls; Magnetic domains; Magnetic fields; Magnetic hysteresis; Magnetic switching; Magnetization reversal; Magnetostatics; Micromagnetics; Switches; Magnetic domain; magnetic domain wall; magnetization reversal; micromagnetic simulation; nanomagnetism;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2043222
