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

Flacke L, Liensberger L, Althammer M, Huebl H, Gepraegs S, Schultheiss K, Buzdakov A, Hula T, Schultheiss H, Edwards ERJ, Nembach HT, Shaw JM, Gross R, Weiler M (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Applied Physics Letters American Institute of Physics (AIP)

Book Volume: 115

Article Number: 122402

Journal Issue: 12

DOI: 10.1063/1.5102132

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 26 nm thick sample to be α 0 3.18 × 10 - 4. Furthermore, using Brillouin light scattering microscopy, we measured spin-wave propagation lengths of up to (21 ± 1) μm in a 26 nm thick Co25Fe75 heterostructure at room temperature, which is in excellent agreement with the measured damping.

Involved external institutions

Bayerische Akademie der Wissenschaften DE Germany (DE) Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE) National Institute of Standards and Technology (NIST) US United States (USA) (US)

How to cite

APA:

Flacke, L., Liensberger, L., Althammer, M., Huebl, H., Gepraegs, S., Schultheiss, K.,... Weiler, M. (2019). High spin-wave propagation length consistent with low damping in a metallic ferromagnet. Applied Physics Letters, 115(12). https://doi.org/10.1063/1.5102132

MLA:

Flacke, Luis, et al. "High spin-wave propagation length consistent with low damping in a metallic ferromagnet." Applied Physics Letters 115.12 (2019).

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