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Realization of a spin wave switch based on the Spin-Transfer-Torque effect

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arxiv 1802.01294 v1 pith:IJMFVKHK submitted 2018-02-05 cond-mat.mes-hall

Thomas Meyer , Thomas Brächer , Frank Heussner , Alexander A. Serga , Hiroshi Naganuma , Koki Mukaiyama , Mikihiko Oogane , Yasuo Ando
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Burkard Hillebrands Philipp Pirro
This is my paper · ORCID
classification cond-mat.mes-hall
keywords spinwaveeffectshe-sttamplificationrealizationshiftspin-transfer-torque
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We investigate the amplification of externally excited spin waves via the Spin-Transfer-Torque (STT) effect in combination with the Spin-Hall-Effect (SHE) employing short current pulses. The results reveal that, in the case of an overcompensation of the spin wave damping, a strong nonlinear shift of the spin wave frequency spectrum occurs. In particular, this shift affects the spin wave amplification using the SHE-STT effect. In contrast, this effect allows for the realization of a spin wave switch. By determining the corresponding working point, an efficient spin wave excitation is only possible in the presence of the SHE-STT effect yielding an increased spin wave intensity of a factor of 20 compared to the absence of the SHE-STT effect.

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