Heisenberg Exchange and Dzyaloshinskii-Moriya Interaction in Ultrathin Pt(W)/CoFeB Single and Multilayers

Boettcher T, Lee K, Heussner F, Jaiswal S, Jakob G, Klaeui M, Hillebrands B, Braecher T, Pirro P (2021)

Publication Type: Journal article

Publication year: 2021

Journal

IEEE Transactions on Magnetics Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 57

Article Number: 9427561

Journal Issue: 7

DOI: 10.1109/TMAG.2021.3079259

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.

Involved external institutions

Technische Universität Kaiserslautern DE Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE)

How to cite

APA:

Boettcher, T., Lee, K., Heussner, F., Jaiswal, S., Jakob, G., Klaeui, M.,... Pirro, P. (2021). Heisenberg Exchange and Dzyaloshinskii-Moriya Interaction in Ultrathin Pt(W)/CoFeB Single and Multilayers. IEEE Transactions on Magnetics, 57(7). https://doi.org/10.1109/TMAG.2021.3079259

MLA:

Boettcher, Tobias, et al. "Heisenberg Exchange and Dzyaloshinskii-Moriya Interaction in Ultrathin Pt(W)/CoFeB Single and Multilayers." IEEE Transactions on Magnetics 57.7 (2021).

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