Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 21: Poster I
MA 21.28: Poster
Dienstag, 13. März 2018, 09:30–13:00, Poster A
Injection locking of constriction based Spin-Hall nano-oscillators — •Tillmann Weinhold1,2, Toni Hache1,3, Sri Sai Phani Kanth Arekapudi1,3, Olav Hellwig1,3, and Helmut Schultheiss1,2 — 1Helmholtz-Zentrum Dresden-Rossendorf, Institut für Ionenstrahlphysik und Materialforschung, Abteilung Magnetismus — 2Faculty of Physics, Technische Universität Dresden, 01062 Dresden, Germany — 3Institut für Physik,Technische Universität Chemnitz, D-09107 Chemnitz
Spin-Hall nano-oscillators (SHNOs) are modern auto-oscillation devices. Their simple geometry allows for an optical characterization by Brillouin-Light-Scattering microscopy at room temperature. Here we report on the observation of dc-driven auto-oscillations in constriction based SHNOs under the forcing influence of an added microwave current. We show the possibility of injection locking between the applied external signal and the auto-oscillations driven by a direct current. Within the locking range the frequency of the auto-oscillations is forced to the external stimulus. Furthermore, the intensity of the oscillations is strongly increased and the linewidth decreases. Due to the controllability of the auto-oscillations of the magnetization, injection locking can be used to influence the properties of future communication technologies, e.g. based on synchronized constriction based Spin-Hall nano-oscillator arrays.