Magnetic domain size tuning in asymmetric Pd/Co/W/Pd multilayers with perpendicular magnetic anisotropy

Magnetic multilayers presenting perpendicular magnetic anisotropy (PMA) have great potential for technological applications. On the path to develop further magnetic devices, one can adjust the physical properties of multilayered thin films by modifying their interfaces, thus determining the magnetic...

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Bibliographic Details
Published in:Applied physics letters 2019-10, Vol.115 (18)
Main Authors: Dugato, D. A., Brandão, J., Seeger, R. L., Béron, F., Cezar, J. C., Dorneles, L. S., Mori, T. J. A.
Format: Article
Language:English
Subjects:
Anisotropy
Applied physics
Chirality
Cobalt
Magnetic anisotropy
Magnetic devices
Magnetic domains
Magnetic fields
Magnetic properties
Magnetic saturation
Magnetism
Multilayered thin films
Multilayers
Palladium
Physical properties
Thin films
Tungsten
Tuning
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Summary:Magnetic multilayers presenting perpendicular magnetic anisotropy (PMA) have great potential for technological applications. On the path to develop further magnetic devices, one can adjust the physical properties of multilayered thin films by modifying their interfaces, thus determining the magnetic domain type, chirality, and size. Here, we demonstrate the tailoring of the domain pattern by tuning the perpendicular anisotropy, the saturation magnetization, and the interfacial Dzyaloshinskii-Moriya interaction (iDMI) in Pd/Co/Pd multilayers with the insertion of an ultrathin tungsten layer at the top interface. The average domain size decreases around 60% when a 0.2 nm thick W layer is added to the Co/Pd interface. Magnetic force microscopy images and micromagnetic simulations were contrasted to elucidate the mechanisms that determine the domain textures and sizes. Our results indicate that both iDMI and PMA can be tuned by carefully changing the interfaces of originally symmetric multilayers, leading to magnetic domain patterns promising for high density magnetic memories.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5123469