Suppression of all-optical switching in He+ -irradiated Co/Pt multilayers: influence of the domain-wall energy

The observation of all-optical helicity-dependent switching (AO-HDS) in ferri- and ferro-magnetic materials depends not only on the saturation magnetization, but on the magnetic domain size which takes into account the competition between the demagnetizing energy and the domain wall (DW) energy. In...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2018-05, Vol.51 (21), p.215004
Main Authors: El Hadri, Mohammed Salah, Hehn, Michel, Malinowski, Grégory, Beigné, Cyrille, Fullerton, Eric E, Ravelosona, Dafiné, Mangin, Stéphane
Format: Article
Language:English
Subjects:
all-optical switching
Condensed Matter
ferromagnetic multilayers
helium ion irradiation
magnetic anisotropy
Materials Science
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The observation of all-optical helicity-dependent switching (AO-HDS) in ferri- and ferro-magnetic materials depends not only on the saturation magnetization, but on the magnetic domain size which takes into account the competition between the demagnetizing energy and the domain wall (DW) energy. In this paper, we study the optical response of Co/Pt multilayers for which perpendicular magnetic anisotropy can be tuned using He+ -irradiation. This allows us to correlate the observation of AO-HDS with the magnetic properties of the He+ -irradiated multilayer. These results give direct evidence of the crucial role of the DW energy in the laser-induced switching process.
ISSN:0022-3727
1361-6463
DOI:10.1088/1361-6463/aabf2b