High Spin-Wave Propagation Length Consistent with Low Damping in a Metallic Ferromagnet
| Autor: | Hans Huebl, Stephan Geprägs, Mathias Weiler, Katrin Schultheiss, Hans T. Nembach, Luis Flacke, Tobias Hula, Helmut Schultheiss, Eric R. J. Edwards, Justin M. Shaw, Lukas Liensberger, Matthias Althammer, Rudolf Gross, Aleksandr Buzdakov |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) low magnetic damping FOS: Physical sciences 02 engineering and technology 01 natural sciences Light scattering Article spin-wave propagation Brillouin light scattering Condensed Matter::Materials Science Spin wave 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Radiative transfer 010302 applied physics Condensed Matter - Materials Science Spin pumping Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Ferromagnetic resonance Brillouin zone Ferromagnetism ferromagnetic resonance Magnetic damping 0210 nano-technology |
| Zdroj: | Applied Physics Letters 115(2019)12, 122402 Appl Phys Lett |
| DOI: | 10.48550/arxiv.1904.11321 |
| Popis: | We report ultra-low intrinsic magnetic damping in Co$_{\text{25}}$Fe$_{\text{75}}$ heterostructures, reaching the low $10^{-4}$ regime at room temperature. By using a broadband ferromagnetic resonance technique, we extracted the dynamic magnetic properties of several Co$_{\text{25}}$Fe$_{\text{75}}$-based heterostructures with varying ferromagnetic layer thickness. By estimating the eddy current contribution to damping, measuring radiative damping and spin pumping effects, we found the intrinsic damping of a 26\,nm thick sample to be $$\alpha_{\mathrm{0}} \lesssim 3.18\times10^{-4}$. Furthermore, using Brillouin light scattering microscopy we measured spin-wave propagation lengths of up to $(21\pm1)\,\mathrm{\mu m}$ in a 26 nm thick Co$_{\text{25}}$Fe$_{\text{75}}$ heterostructure at room temperature, which is in excellent agreement with the measured damping. Comment: Updated Version |
| Databáze: | OpenAIRE |
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