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Dipolar-stabilized first and second-order antiskyrmions in ferrimagnetic multilayers

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Heigl Michael, Koraltan Sabri, Vaňatka Marek, Kraft Robert, Abert Claas, Vogler Christoph, Semisalova Anna, Che Ping, Ullrich Aladin, Schmidt Timo, Hintermayr Julian, Grundler Dirk, Farle Michael, Urbánek Michal, Suess Dieter, Albrecht Manfred,
Project Discovery and Nanoengineering of Novel Skyrmion-hosting Materials
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Original article (peer-reviewed)

Journal Nature Communications
Volume (Issue) 12(1)
Page(s) 2611 - 2611
Title of proceedings Nature Communications
DOI 10.1038/s41467-021-22600-7

Open Access

URL http://doi.org/10.1038/s41467-021-22600-7
Type of Open Access Publisher (Gold Open Access)

Abstract

Abstract Skyrmions and antiskyrmions are topologically protected spin structures with opposite vorticities. Particularly in coexisting phases, these two types of magnetic quasi-particles may show fascinating physics and potential for spintronic devices. While skyrmions are observed in a wide range of materials, until now antiskyrmions were exclusive to materials with D 2d symmetry. In this work, we show first and second-order antiskyrmions stabilized by magnetic dipole–dipole interaction in Fe/Gd-based multilayers. We modify the magnetic properties of the multilayers by Ir insertion layers. Using Lorentz transmission electron microscopy imaging, we observe coexisting antiskyrmions, Bloch skyrmions, and type-2 bubbles and determine the range of material properties and magnetic fields where the different spin objects form and dissipate. We perform micromagnetic simulations to obtain more insight into the studied system and conclude that the reduction of saturation magnetization and uniaxial magnetic anisotropy leads to the existence of this zoo of different spin objects and that they are primarily stabilized by dipolar interaction.
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