High spin-wave propagation length consistent with low damping in a metallic ferromagnet

Published

August 31, 2019

Author(s)

L. Flacke, L. Liensberger, Matthias Althammer, Hans Huebl, Stephan Gepr?ags, Katrin Schultheiss, Aleksandr Buzdakov, T. Hula, H. Schultheiss, Eric R. Edwards, Hans Nembach, Justin Shaw, Rudolf Gross, M. Weiler

Abstract

We report ultralow intrinsic magnetic damping in Co₂₅Fe₇₅ heterostructures, reaching the low 10^-4 regime at room temperature. By using a broadband ferromagnetic resonance technique in out-of-plane geometry, we extracted the dynamic magnetic properties of several Co₂₅Fe₇₅ based heterostructures with varying ferromagnetic layer thicknesses. By measuring radiative damping and spin pumping effects, we found the intrinsic damping of a 26nm thick sample to be a0less than or equal to} 3:18x10^-4. Furthermore, using Brillouin light scattering microscopy, we measured spin-wave propagation lengths of up to (2161) lm in a 26nm thick Co₂₅Fe₇₅ heterostructure at room temperature, which is in excellent agreement with the measured damping.

Citation

Applied Physics Letters

Volume

115

Pub Type

Journals

Download Paper

https://doi.org/10.1063/1.5102132

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Keywords

magnetics, nanotechnology, nanomagnetics, heterostructures, ferromagnetics, Brillouin, light scattering microscopy

Citation

Flacke, L. , Liensberger, L. , Althammer, M. , Huebl, H. , Gepr?ags, S. , Schultheiss, K. , Buzdakov, A. , Hula, T. , Schultheiss, H. , Edwards, E. , Nembach, H. , Shaw, J. , Gross, R. and Weiler, M. (2019), High spin-wave propagation length consistent with low damping in a metallic ferromagnet, Applied Physics Letters, [online], https://doi.org/10.1063/1.5102132, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927838 (Accessed April 26, 2024)