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arXiv · 1802.01294

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

Thomas Meyer·Thomas Brächer·Frank Heussner·Alexander A. Serga·Hiroshi Naganuma·Koki Mukaiyama·Mikihiko Oogane·Yasuo Ando·Burkard Hillebrands·Philipp Pirro
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Abstract

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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Thomas Meyer, Thomas Brächer, Frank Heussner, Alexander A. Serga, Hiroshi Naganuma, Koki Mukaiyama, Mikihiko Oogane, Yasuo Ando, Burkard Hillebrands, Philipp Pirro. 2018-02-05. Realization of a spin wave switch based on the Spin-Transfer-Torque effect. https://doi.org/10.1109/lmag.2018.2803737

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