Temporal Evolution of Auto-Oscillations in an Yttrium-Iron-Garnet/Platinum Microdisk Driven by Pulsed Spin Hall Effect-Induced Spin-Transfer Torque
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Ross_Temporal evolution.pdf
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Author(s)
Lauer, Viktor
Schneider, Michael
Meyer, Thomas
Bracher, Thomas
Pirro, Philipp
Heinz, Bjorn
Heussner, Frank
Lagel, Bert
Hillebrands, Burkard
Chumak, Andrii V.
Date Issued
January 2017
Journal
IEEE Magnetics Letters
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Lauer, Viktor et al. “Temporal Evolution of Auto-Oscillations in an Yttrium-Iron-Garnet/Platinum Microdisk Driven by Pulsed Spin Hall Effect-Induced Spin-Transfer Torque.” IEEE Magnetics Letters 8 (2017): 1–4. © 2017 EU
Version
Original manuscript
Abstract
The temporal evolution of pulsed spin Hall effect-spin transfer torque (SHE-STT) driven auto-oscillations in a yttrium iron garnet (YIG)-platinum (Pt) microdisk is studied experimentally using time-resolved Brillouin light scattering spectroscopy. The frequency of the auto-oscillations is different in the center when compared to the edge of the disk and is related to the simultaneous STT excitation of a bullet and a non-localized spin-wave mode. Furthermore, the magnetization precession intensity saturates on a time scale of 20 ns or longer, depending on the current density. For this reason, our findings suggest that a proper ratio between the current and the pulse duration is of crucial importance for future STT-based devices.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1109/LMAG.2017.2661243
