Ferrimagnetic Skyrmions in Topological Insulator/Ferrimagnet Heterostructures

Ferrimagnetic Skyrmions in Topological Insulator/Ferrimagnet Heterostructures

© 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 32(2020), 34 vom: 15. Aug., Seite e2003380
1. Verfasser: Wu, Hao (VerfasserIn)
Weitere Verfasser: Groß, Felix, Dai, Bingqian, Lujan, David, Razavi, Seyed Armin, Zhang, Peng, Liu, Yuxiang, Sobotkiewich, Kemal, Förster, Johannes, Weigand, Markus, Schütz, Gisela, Li, Xiaoqin, Gräfe, Joachim, Wang, Kang L
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article Dzyaloshinskii-Moriya interaction ferrimagnetic skyrmions ferrimagnets topological insulators
Beschreibung
Zusammenfassung:© 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Magnetic skyrmions are topologically nontrivial chiral spin textures that have potential applications in next-generation energy-efficient and high-density spintronic devices. In general, the chiral spins of skyrmions are stabilized by the noncollinear Dzyaloshinskii-Moriya interaction (DMI), originating from the inversion symmetry breaking combined with the strong spin-orbit coupling (SOC). Here, the strong SOC from topological insulators (TIs) is utilized to provide a large interfacial DMI in TI/ferrimagnet heterostructures at room temperature, resulting in small-size (radius ≈ 100 nm) skyrmions in the adjacent ferrimagnet. Antiferromagnetically coupled skyrmion sublattices are observed in the ferrimagnet by element-resolved scanning transmission X-ray microscopy, showing the potential of a vanishing skyrmion Hall effect and ultrafast skyrmion dynamics. The line-scan spin profile of the single skyrmion shows a Néel-type domain wall structure and a 120 nm size of the 180° domain wall. This work demonstrates the sizable DMI and small skyrmions in TI-based heterostructures with great promise for low-energy spintronic devices
Beschreibung:Date Revised 30.09.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202003380