Magnetization Dynamics in Proximity-Coupled Superconductor-Ferromagnet-Superconductor Multilayers
| Autor: | M. Yu. Kupriyanov, Alexey V. Ustinov, Alexandre Avraamovitch Golubov, Mikhail Silaev, N. N. Abramov, Igor Shchetinin, Valery V. Ryazanov, V. I. Chichkov, Vasily S. Stolyarov, Igor A. Golovchanskiy |
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| Přispěvatelé: | Interfaces and Correlated Electron Systems |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
magneettiset ominaisuudet
Materials science suprajohtavuus FOS: Physical sciences magnetization dynamics General Physics and Astronomy Applied Physics (physics.app-ph) spin waves magnons suprajohteet Superconductivity (cond-mat.supr-con) Magnetization Condensed Matter::Materials Science ferromagnets Condensed Matter::Superconductivity Anisotropy Superconductivity Magnonics Magnetization dynamics Condensed matter physics type-II superconductors Condensed Matter - Superconductivity Physics - Applied Physics Ferromagnetic resonance Magnetic anisotropy Ferromagnetism proximity effect multilayer thin films Condensed Matter::Strongly Correlated Electrons ohutkalvot |
| Zdroj: | Physical review applied, 14(2):024086. American Physical Society |
| ISSN: | 2331-7019 |
| DOI: | 10.1103/physrevapplied.14.024086 |
| Popis: | In this work, magnetization dynamics is studied in superconductor/ferromagnet/superconductor three-layered films in a wide frequency, field, and temperature ranges using the broad-band ferromagnetic resonance measurement technique. It is shown that in presence of both superconducting layers and of superconducting proximity at both superconductor/ferromagnet interfaces a massive shift of the ferromagnetic resonance to higher frequencies emerges. The phenomenon is robust and essentially long-range: it has been observed for a set of samples with the thickness of ferromagnetic layer in the range from tens up to hundreds of nanometers. The resonance frequency shift is characterized by proximity-induced magnetic anisotropies: by the positive in-plane uniaxial anisotropy and by the drop of magnetization. The shift and the corresponding uniaxial anisotropy grow with the thickness of the ferromagnetic layer. For instance, the anisotropy reaches 0.27~T in experiment for a sample with 350~nm thick ferromagnetic layer, and about 0.4~T in predictions, which makes it a ferromagnetic film structure with the highest anisotropy and the highest natural resonance frequency ever reported. Various scenarios for the superconductivity-induced magnetic anisotropy are discussed. As a result, the origin of the phenomenon remains unclear. Application of the proximity-induced anisotropies in superconducting magnonics is proposed as a way for manipulations with a spin-wave spectrum. 10 pages, 6 figures |
| Databáze: | OpenAIRE |
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