Ferromagnetic and spin wave resonances in thin layer of expanded austenite phase
| Autor: | N. Guskos, Jolanta Baranowska, Paweł Berczyński, Janusz Typek, S. Fryska, Grzegorz Zolnierkiewicz, Aleksander Guskos |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
thin layer
Materials science Condensed matter physics Mechanical Engineering Magnon Resonance Condensed Matter Physics Magnetostatics Ferromagnetic resonance spin waves Condensed Matter::Materials Science Magnetization Magnetic anisotropy expanded austenite Ferromagnetism ferromagnetic resonance Mechanics of Materials Spin wave TA401-492 General Materials Science Materials of engineering and construction. Mechanics of materials |
| Zdroj: | Materials Science-Poland, Vol 32, Iss 2, Pp 198-205 (2014) |
| Popis: | Four samples of austenite coatings deposited by reactive magnetron sputtering on silicon substrate at four different temperatures and pressures were investigated by ferromagnetic resonance (FMR) method at room temperature. The expanded austenite phase S (γ N) layers with thickness in the 160–273 nm range and concentration of magnetic atoms: 72 % Fe, 18 % Cr and 10 % Ni, were obtained. The coatings with nanometric size grains were strongly textured and grown mostly in [100] direction, perpendicular to the sample surface. Intense FMR spectra were recorded at various angles between the static magnetic field direction and the sample surface. A strong magnetic anisotropy of the main uniform FMR mode was observed and the effective magnetization 4πM eff determined. Spin wave resonance (SWR) modes were observed in all investigated samples in out-of-plane geometry of the magnetic field. The resonance fields of SWR modes in our samples varied linearly with the spin wave mode number. The value of the effective magnon stiffness constant was determined assuming a parabolic shape of the magnetization variation across the sample thickness. |
| Databáze: | OpenAIRE |
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