Domain wall motion induced magnetophoresis in unpatterned perpendicular magnetic anisotropy Co layers with Dzyaloshinskii-Moriya interactions

Autor:	Michał Matczak, Gabriel D. Chaves-O'Flynn, Maciej Urbaniak, Arno Ehresmann, Meike Reginka, Piotr Kuświk
Rok vydání:	2021
Předmět:	Micrometre Materials science Domain wall (magnetism) Condensed matter physics Perpendicular magnetic anisotropy Perpendicular Motion (geometry) Superparamagnetic beads Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field
Zdroj:	Journal of Magnetism and Magnetic Materials. 519:167454
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2020.167454
Popis:	Magnetophoresis of micrometer sized superparamagnetic beads on sputtered Ir/Co(1.2 nm)/Ir multilayers with perpendicular magnetic anisotropy has been investigated. We show that domain walls motion in these layer systems is controlling the motion of the beads in an aqueous environment, where the domain wall motion is induced by varying perpendicular external magnetic fields of several kA/m. The magnetic fields of the Neel type walls, and forces calculated based on micromagnetic simulations of their structure, are consistent with viscous forces observed in the experiment. We show that the cylindrical domains can be used to efficiently gather originally scattered beads in a small area.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::764568342732e149d0564aeae4d6a124 https://doi.org/10.1016/j.jmmm.2020.167454 Zobrazit plný text záznamu Full Text from ScienceDirect