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Authors: Zhao, Xiaoxuan
Zhang, Boyu
Vernier, Nicolas
Zhang, Xueying
Sall, Mamour
Xing, Tao
Herrera Diez, Liza
Hepburn, Carolyna
Wang, Lin
Durin, Gianfranco
Casiraghi, Arianna
Belmeguenai, Mohamed
Roussigné, Yves
Stashkevich, Andrei
Chérif, Salim Mourad
Langer, Jürgen
Ocker, Berthold
Jaiswal, Samridh
Jakob, Gerhard
Kläui, Mathias
Zhao, Weisheng
Ravelosona, Dafiné
Title: Enhancing domain wall velocity through interface intermixing in W-CoFeB-MgO films with perpendicular anisotropy
Online publication date: 6-Nov-2019
Language: english
Abstract: We study the influence of He irradiation induced interface intermixing on magnetic domain wall (dw) dynamics in w-cofeb (0.6 nm)-mgo ultrathin films, which exhibit high perpendicular magnetic anisotropy and large dzyaloshinskii-moriya interaction (dmi) values. whereas the pristine films exhibit strong dw pinning, we observe a large increase in the dw velocity in the creep regime upon he irradiation, which is attributed to the reduction of pinning centers induced by interface intermixing. asymmetric in-plane field-driven domain expansion experiments show that the dmi value is slightly reduced upon irradiation, and a direct relationship between dmi and interface anisotropy is demonstrated. our findings provide insights into the material design and interface control for dw dynamics, as well as for dmi, enabling the development of high-performance spintronic devices based on ultrathin magnetic layers.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
URN: urn:nbn:de:hebis:77-publ-593969
Version: Accepted version
Publication type: Zeitschriftenaufsatz
License: In Copyright
Information on rights of use:
Journal: Applied physics letters
Pages or article number: Art. 122404
Publisher: American Inst. of Physics
Publisher place: Melville, NY
Issue date: 2019
ISSN: 1077-3118
Publisher URL:
Publisher DOI: 10.1063/1.5121357
Appears in collections:JGU-Publikationen

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