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

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1552

Lastpage

1555

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2043222

Filename

5467601