Journal article
Modifications of magnetic anisotropy and magnetization reversal in [Co0.4 nm/Pd0.7 nm]₅₀ multilayers induced by 10 keV-He ion bombardment



Publication Details
Authors:
Ehresmann, A.; Hellwig, O.; Buhl, O.; Müglich, N.; Weis, T.; Engel, D.
Publication year:
2012
Journal:
Journal of Applied Physics
Pages range:
063901
Volume number:
112
ISSN:
0021-8979

Abstract
[Co0.4 nm/Pd0.7 nm]50 multilayers with Pd film thicknesses in the first ferromagnetic maximum of interlayer exchange coupling display almost purely perpendicular-to-plane anisotropy and labyrinth stripe domain patterns in remanence. Their magnetization reversal is characterized by domain nucleation starting at a defined field HN and domain wall movement in a defined magnetic field range. The modification of the magnetization reversal by 10 keV He ion bombardment due to the reduced magnetic anisotropy has been investigated by polar magneto-optical Kerr effect, by vibrating sample magnetometry, and by magnetic force microscopy at room temperature. It is shown that the ion bombardment creates and increases areas with ferromagnetic in-plane anisotropy and proportions of the sample showing superparamagnetism, the latter predominantly in the deeper layers.


Research Areas


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