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
Year of first publication:	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
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-6306
Version:	Accepted version
Publication type:	Zeitschriftenaufsatz
Document type specification:	Scientific article
License:	In Copyright
Information on rights of use:	http://rightsstatements.org/vocab/InC/1.0/
Journal:	IEEE transactions on magnetics 57 7
Pages or article number:	1600207
Publisher:	IEEE
Publisher place:	New York, NY
Issue date:	2021
ISSN:	0018-9464
Publisher URL:	https://doi.org/10.1109/TMAG.2021.3079259
Publisher DOI:	10.1109/TMAG.2021.3079259
Appears in collections:	JGU-Publikationen