Nichtlineare Spinwellendynamik in dünnen magnetischen Schichten und Strukturen
Zusammenfassung der Projektergebnisse
This project is devoted to the study of of various fundamental nonlinear spin-wave phenomena, including generation of spin-wave single- and multi-solitonic wavepackets with controllable shape, synchronization of spin-wave chaotic oscillations in active rings based on ferromagnetic films and multiferroic layered structures, as well as nonlinear spin-wave modes in metallic magnetic microand nanosystems with low damping confined in the two lateral dimensions driven by spin currents. A simultaneous study of both active and passive magnetic systems allows us a comprehensive investigation of a wide variety of effects that belong to the most modern directions of magnetism. The main achievement of the project is the demonstration of the route to control chaotic dynamics in active rings based on nonlinear spin waves, including fractal spin-wave solitons as well as amplification and excitation of spin waves by both parametric pumping and injection of pure spin current. This achievement enabled the development of novel electrically-controlled macro- and nano-size microwave oscillators as well as spin-wave logic gates which are of great importance for modern spin-based communication and signal-processing technologies, including image recognition, cryptography, and neuromorphic computing. In the course of the project implementation, we have also studied different propagation of spin waves in thermal gradients and introduced novel low-damping magnetic materials.
Projektbezogene Publikationen (Auswahl)
- “A spin-wave logic gate based on a width-modulated dynamic magnonic crystals”, Appl. Phys. Lett. 106, 102405 (2015)
A.A. Nikitin, A.B. Ustinov, A.A. Semenov, A.V. Chumak, A.A. Serga, V.I. Vasuchka, E. Lähderanta, B.A. Kalinikos, and B. Hillebrands
(Siehe online unter https://doi.org/10.1063/1.4914506) - “All-optical characterisation of the spintronic Heusler compound Co2Mn0.6Fe0.4Si”, J. Phys. D: Appl. Phys. 48, 164015 (2015)
T. Sebastian, Y. Kawada, B. Obry, T. Brächer, P. Pirro, D.A. Bozhko, A.A. Serga, H. Naganuma, M. Oogane, Y. Ando and B. Hillebrands
(Siehe online unter https://doi.org/10.1088/0022-3727/48/16/164015) - "Analysis of the broadband chaotic spin-wave excitations in an active ring oscillator based on a metalized ferrite film", J. Phys. Conf. Ser. 769, 012089 (2016)
A. V. Kondrashov, A. B. Ustinov, B. A. Kalinikos, S. O. Demokritov
(Siehe online unter https://doi.org/10.1088/1742-6596/769/1/012089) - “Reconfigurable heat-induced spin wave lenses”, Appl. Phys. Lett. 109, 232407 (2016)
O. Dzyapko, I. V. Borisenko, V. E. Demidov, W. Pernice, and S.O. Demokritov
(Siehe online unter https://doi.org/10.1063/1.4971829) - “Spin-electromagnetic waves in planar multiferroic multilayers”, J. Appl. Phys. 122, 014102 (2017)
A. A. Nikitin, A. B. Ustinov, V. V. Vitko, A. A. Nikitin, A. V. Kondrashov, P. Pirro, E. Lähderanta, B. A. Kalinikos, and B. Hillebrands
(Siehe online unter https://doi.org/10.1063/1.4990991) - “Bullets and droplets: Two-dimensional spin-wave solitons in modern magnonics”, Low Temp. Phys. 44, 602 (2018)
O.R. Sulymenko, O.V. Prokopenko, V.S. Tyberkevych, A.N. Slavin, A.A. Serga
(Siehe online unter https://doi.org/10.1063/1.5041426) - “Exact Spin-Wave Fractals in Magnonic Crystals”, Phys. Rev. Lett. 121, 107204 (2018)
D. Richardson, B. Kalinikos, L. Carr, M. Wu
(Siehe online unter https://doi.org/10.1103/PhysRevLett.121.107204) - “Excitation and Amplification of Spin Waves by Spin–Orbit Torque”, Adv. Mater. 1802837 (2018)
B. Divinskiy, V.E. Demidov, S. Urazhdin, R. Freeman, A.B. Rinkevich, and S. O. Demokritov
(Siehe online unter https://doi.org/10.1002/adma.201802837) - “Spin-wave propagation through a magnonic crystal in a thermal gradient”, J. Phys. D: Appl. Phys. 51, 344002 (2018)
T. Langner, D.A. Bozhko, S.A. Bunyaev, G.N. Kakazei, A.V. Chumak, A.A. Serga, B. Hillebrands, V.I. Vasyuchka
(Siehe online unter https://doi.org/10.1088/1361-6463/aad2ac)
