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Issue 35, 2020
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Observation of compact ferrimagnetic skyrmions in DyCo3 film

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Abstract

Owing to the experimental discovery of magnetic skyrmions stabilized by the Dzyaloshinskii–Moriya and/or dipolar interactions in thin films, there is a recent upsurge of interest in magnetic skyrmions with antiferromagnetic spins in order to overcome the fundamental limitations inherent with skyrmions in ferromagnetic materials. Here, we report on the observation of compact ferrimagnetic skyrmions for the class of amorphous alloys consisting of 4f rare-earth and 3d transition-metal elements with perpendicular magnetic anisotropy, using a DyCo3 film, that are identified by combining X-ray magnetic scattering, scanning transmission X-ray microscopy, and Hall transport technique. These skyrmions, with antiparallel aligned Dy and Co magnetic moments and a characteristic core radius of about 40 nm, are formed during the nucleation and annihilation of the magnetic maze-like domain pattern exhibiting a topological Hall effect contribution. Our findings provide a promising route for fundamental research in the field of ferrimagnetic/antiferromagnetic spintronics towards practical applications.

Graphical abstract: Observation of compact ferrimagnetic skyrmions in DyCo3 film

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Article information


Submitted
14 Apr 2020
Accepted
31 Jul 2020
First published
06 Aug 2020

Nanoscale, 2020,12, 18137-18143
Article type
Paper

Observation of compact ferrimagnetic skyrmions in DyCo3 film

K. Chen, D. Lott, A. Philippi-Kobs, M. Weigand, C. Luo and F. Radu, Nanoscale, 2020, 12, 18137
DOI: 10.1039/D0NR02947E

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