Relaxation mechanisms in ultra-low damping Fe80Co20 thin films
| Autor: | Etienne Goovaerts, Alejandro Butera, D. Velázquez Rodriguez, J.E. Gómez, M. van Landeghem, L. Avilés Félix, G. Alejandro |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
MOSAICITY Materials science Spintronics Condensed matter physics Magnon Relaxation (NMR) ULTRA-LOW MAGNETIC DAMPING 02 engineering and technology purl.org/becyt/ford/1.3 [https] 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Ferromagnetic resonance CUBIC ANISOTROPY Mosaicity Electronic Optical and Magnetic Materials purl.org/becyt/ford/1 [https] Ferromagnetism Sputtering 0103 physical sciences TWO MAGNON SCATTERING Thin film 0210 nano-technology |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | Ferromagnetic thin films with ultra-low damping constants (α) are intensively studied for applications in spintronic devices. We report here the influence of the sputtering conditions (deposition power and temperature) on the magnetic properties of Fe80Co20/Ta bilayers deposited on MgO (0 0 1) and Si (0 0 1) which have been studied using ferromagnetic resonance (FMR) and magneto-optic Kerr-effect (MOKE) techniques. We have found that for the studied fabrication conditions the samples deposited on MgO (0 0 1) have [1 0 0] epitaxial growth with a cubic anisotropy field Hc ~ 300 Oe, while those sputtered on Si (0 0 1) grow polycrystalline with a small uniaxial anisotropy due to the deposition conditions. With measurements at different excitation frequencies we have determined exceptionally low damping values for ferromagnetic conductors (α ~ 3 × 10−3), which makes the Fe80Co20/Ta system an excellent candidate for future applications in spintronic devices. From the analysis of the dependence of the FMR linewidth on the orientation of the applied magnetic field and the excitation frequency in FMR experiments, we were able to separate the contribution of the different relaxation mechanisms (Gilbert damping, two magnon scattering and mosaicity) to the linewidth and to explain quantitatively the observed behavior. Fil: Velázquez Rodriguez, Daniel. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina Fil: Gomez, Javier Enrique. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina Fil: Alejandro, Gabriela. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina Fil: Avilés Félix, Luis. Universite Grenoble Alpes; Francia Fil: Van Landeghem, Melissa. Universite Libre de Bruxelles. Universiteit Antwerpen; Bélgica Fil: Goovaerts, Etienne. Universite Libre de Bruxelles. Universiteit Antwerpen; Bélgica Fil: Butera, Alejandro Ricardo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Universidad Nacional de Cuyo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina |
| Databáze: | OpenAIRE |
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