| Autor: |
Lauer, Viktor, Schneider, Michael, Meyer, Thomas, Bracher, Thomas, Pirro, Philipp, Heinz, Bjorn, Heussner, Frank, Lagel, Bert, Onbasli, Mehmet C., Ross, Caroline A., Hillebrands, Burkard, Chumak, Andrii V. |
| Zdroj: |
IEEE Magnetics Letters; 2017, Vol. 8, p1-4, 4p |
| Abstrakt: |
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. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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