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Tuning the size of skyrmion by strain at the Co/Pt₃ interfaces

Jiang, Lingzi ; Huang, Can ; Zhu, Yan ; Pan, Yanfei ; Fan, Jiyu ; Zhang, Kaicheng ; Ma, Chunlan ; Shi, Daning ; Zhang, Hongbin (2022):
Tuning the size of skyrmion by strain at the Co/Pt₃ interfaces. (Publisher's Version)
In: iScience, 25 (4), Elsevier, ISSN 2589-0042,
DOI: 10.26083/tuprints-00021411,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Tuning the size of skyrmion by strain at the Co/Pt₃ interfaces
Language: English
Abstract:

Based on density functional theory calculations, we elucidated the tunability of the atomic structures and magnetic interactions of Co/Pt₃ interface (one layer of hcp(0001) Co and three layers of fcc(111) Pt) and thus the skyrmion sizes using strain. The dispersion relations of the spin spiral in the opposite directions, E(q) and E(-q), were evaluated based on generalized Bloch equations. Effective exchange coupling (EC) and Dzyaloshinsky-Moriya interaction (DMI) parameters between different neighbors Ji and di at different lattice constants were derived by fitting the resulting spin spiral dispersion E(q) to EC model with DMI and E(q)- E(-q) formula, respectively. We observed an increase in DMI and a significant decrease in EC with an increase in strain. Hence, the size of Ne´ el-type skyrmions determined by the ratio of EC/DMI can be controlled by applying strain, leading to an effective approach to tailor the formation of skyrmion lattices by inducing slight structural modifications on the magnetic thin films.

Journal or Publication Title: iScience
Volume of the journal: 25
Issue Number: 4
Publisher: Elsevier
Collation: 13 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Material Science
LOEWE > LOEWE-Schwerpunkte > FLAME - Fermi Level Engineering Antiferroelektrischer Materialien für Energiespeicher und Isolatoren
Date Deposited: 24 May 2022 10:13
Last Modified: 24 May 2022 10:13
DOI: 10.26083/tuprints-00021411
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-214114
Additional Information:

Part of special issue: SI: 2D materials electronics (s. verwandtes Werk)

Keywords: Condensed matter physics, interface science, nanomaterials

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21411
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