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Authors: Böttcher, Tobias
Lee, Kyujoon
Heussner, Frank
Jaiswal, Samridh
Jakob, Gerhard
Kläui, Mathias
Hillebrands, Burkard
Brächer, Thomas
Pirro, Philipp
Title: Heisenberg exchange and Dzyaloshinskii-sMoriya interaction in ultrathin Pt(W)/CoFeB single and multilayer
Online publication date: 1-Oct-2021
Language: english
Abstract: We present results of the analysis of Brillouin light-scattering (BLS) measurements of spin waves performed on ultrathin single and multirepeat CoFeB layers with adjacent heavy metal layers. From a detailed study of the spin-wave dispersion relation, we independently extract the Heisenberg exchange interaction (also referred to as symmetric exchange interaction), the Dzyaloshinskii-Moriya interaction (DMI, also referred to as antisymmetric exchange interaction), and the anisotropy field. We find a large DMI in CoFeB thin films adjacent to a Pt layer and nearly vanishing DMI for CoFeB films adjacent to a W layer. Furthermore, the influence of the dipolar interaction on the dispersion relation and on the evaluation of the Heisenberg exchange parameter is demonstrated. Eventually, an experimental analysis of the impact of the DMI on the spin-wave lifetime is presented.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Accepted version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: in Copyright
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Journal: IEEE transactions on magnetics
Pages or article number: 1600207
Publisher: IEEE
Publisher place: New York, NY
Issue date: 2021
ISSN: 0018-9464
Publisher URL:
Publisher DOI: 10.1109/TMAG.2021.3079259
Appears in collections:JGU-Publikationen

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