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MA: Fachverband Magnetismus
MA 11: Posters Magnetism III
MA 11.31: Poster
Mittwoch, 29. September 2021, 13:30–16:30, P
Agility of spin Hall nano-oscillators — •Francisco Gonçalves1, Toni Hache1, Mauricio Bejarano1,2, Tobias Hula1,3, Olav Hellwig1,3, Jürgen Fassbender1,2, and Helmut Schultheiss1,2 — 1HZDR, Institute of Ion Beam Physics and Materials Research, Germany — 2Technische Universität Dresden, Germany — 3Institut für Physik, Technische Universität Chemnitz, Germany
Spin Hall nano-oscillators (SHNOs) have the ability to convert a direct current input to magnetisation auto-oscillations (AOs) in the gigahertz regime, by means of spin Hall effect and spin orbit torque [1-2]. We report the temporal response of nano-constriction SHNOs driven by voltage pulses, measured using time-resolved Brillouin light scattering microscopy. The SHNOs consist of a double-disk constriction of NiFe(5 nm)/Pt(7 nm). First, we show how few-nanosecond voltage pulses can efficiently induce AOs. Then, we show how the AOs synchronise to external microwave pulses by means of injection-locking [3]. Our findings suggest that the operation time of processes such as synchronisation and logic using SHNOs can be reduced to the nanosecond timescale and that multi-level microwave outputs can be achieved by combination of voltage and RF pulses. Financial support by the Deutsche Forschungsgemeinschaft is gratefully acknowledged within program SCHU2922/1-1.
[1] A. Manchon et al., Rev. Mod. Phys., vol. 91, p. 035004, Sep 2019. [2] T. Hache et al., Applied Physics Letters, vol. 116, no. 19, p. 192405, May 2020. [3] T. Hache et al., Applied Physics Letters, vol. 114, no. 10, p. 102403, Mar 2019.