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

Autor: Heigl M; Institute of Physics, University of Augsburg, Augsburg, Germany. michael.heigl@uni-a.de., Koraltan S; Faculty of Physics, University of Vienna, Vienna, Austria., Vaňatka M; CEITEC BUT, Brno University of Technology, Brno, Czech Republic., Kraft R; Faculty of Physics, University of Vienna, Vienna, Austria., Abert C; Faculty of Physics, University of Vienna, Vienna, Austria.; Research Platform MMM Mathematics - Magnetism - Materials, University of Vienna, Vienna, Austria., Vogler C; Faculty of Physics, University of Vienna, Vienna, Austria., Semisalova A; Center for Nanointegration and Faculty of Physics, University of Duisburg-Essen, Duisburg, Germany., Che P; Laboratory of Nanoscale Magnetic Materials and Magnonics, Institute of Materials (IMX), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland., Ullrich A; Institute of Physics, University of Augsburg, Augsburg, Germany., Schmidt T; Institute of Physics, University of Augsburg, Augsburg, Germany., Hintermayr J; Institute of Physics, University of Augsburg, Augsburg, Germany., Grundler D; Laboratory of Nanoscale Magnetic Materials and Magnonics, Institute of Materials (IMX), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.; Institute of Microengineering (IMT), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland., Farle M; Center for Nanointegration and Faculty of Physics, University of Duisburg-Essen, Duisburg, Germany., Urbánek M; CEITEC BUT, Brno University of Technology, Brno, Czech Republic., Suess D; Faculty of Physics, University of Vienna, Vienna, Austria.; Research Platform MMM Mathematics - Magnetism - Materials, University of Vienna, Vienna, Austria., Albrecht M; Institute of Physics, University of Augsburg, Augsburg, Germany.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2021 May 10; Vol. 12 (1), pp. 2611. Date of Electronic Publication: 2021 May 10.
DOI: 10.1038/s41467-021-22600-7
Abstrakt: 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.
Databáze: MEDLINE
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