Ferromagnet/Superconductor Hybridization for Magnonic Applications |
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| Authors: | Igor A. Golovchanskiy Nikolay N. Abramov Vasily S. Stolyarov Vitaly V. Bolginov Valery V. Ryazanov Alexander A. Golubov Alexey V. Ustinov |
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| Affiliation: | 1. Moscow Institute of Physics and Technology, State University, Dolgoprudny, Moscow Region, Russia;2. National University of Science and Technology MISIS, Moscow, Russia;3. Institute of Solid State Physics (ISSP RAS), Chernogolovka, Moscow Region, Russia;4. Solid State Physics Department, Kazan Federal University, Kazan, Russia;5. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia;6. Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands;7. Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany |
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| Abstract: | In this work, a new hybridization of superconducting and ferromagnetic orders is demonstrated, promising for magnonics. By measuring the ferromagnetic and spin wave resonance absorption spectra of a magnetostatically coupled permalloy/niobium bilayer at different temperatures, magnetostatic spin wave resonances with unconventional dispersion are observed. The mechanism behind the modified dispersion, confirmed with micromagnetic simulations, implies screening of the alternating magnetostatic stray fields of precessing magnetic moments in the ferromagnetic layer by the superconducting surface in the Meissner state. |
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| Keywords: | ferromagnetic resonance magnonics spin waves superconductor/ferromagnet hybrids superconducting Meissner state |
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