Realization of a Spin-Wave Switch Based on the Spin-Transfer-Torque Effect

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

doi:10.1109/LMAG.2018.2803737

Realization of a Spin-Wave Switch Based on the Spin-Transfer-Torque Effect

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

ENG - Applied Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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) resulting from short current pulses. In the case of overcompensation of the spin-wave damping, a strong nonlinear shift of the spin-wave frequency spectrum occurs. In particular, this shift limits spin-wave amplification from the SHE-STT effect. However, it allows for the realization of a spin-wave switch. At the corresponding working point, efficient spin-wave excitation is possible only in the presence of the SHE-STT effect with a spin-wave intensity that is a factor of 20 larger than in the absence of the SHE-STT effect.

Original language	English
Article number	3102005
Journal	IEEE Magnetics Letters
Volume	9
DOIs	https://doi.org/10.1109/LMAG.2018.2803737
Publication status	Published - 2018 Feb 7

Keywords

Spin electronics
magnons
spin waves
spin-Hall effect
spin-transfer torque

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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Realization of a Spin-Wave Switch Based on the Spin-Transfer-Torque Effect. / Meyer, Thomas; Bracher, Thomas; Heussner, Frank; Serga, Alexander A.; Naganuma, Hiroshi; Mukaiyama, Koki; Oogane, Mikihiko ; Ando, Yasuo; Hillebrands, Burkard; Pirro, Philipp.

In: IEEE Magnetics Letters, Vol. 9, 3102005, 07.02.2018.

Research output: Contribution to journal › Article › peer-review

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title = "Realization of a Spin-Wave Switch Based on the Spin-Transfer-Torque Effect",

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) resulting from short current pulses. In the case of overcompensation of the spin-wave damping, a strong nonlinear shift of the spin-wave frequency spectrum occurs. In particular, this shift limits spin-wave amplification from the SHE-STT effect. However, it allows for the realization of a spin-wave switch. At the corresponding working point, efficient spin-wave excitation is possible only in the presence of the SHE-STT effect with a spin-wave intensity that is a factor of 20 larger than in the absence of the SHE-STT effect.",

keywords = "Spin electronics, magnons, spin waves, spin-Hall effect, spin-transfer torque",

author = "Thomas Meyer and Thomas Bracher and Frank Heussner and Serga, {Alexander A.} and Hiroshi Naganuma and Koki Mukaiyama and Mikihiko Oogane and Yasuo Ando and Burkard Hillebrands and Philipp Pirro",

note = "Funding Information: This work was supported in part by the DFG in the framework of the Research Unit TRR 173 “Spin+X” (Projects B01 and B04) and in part by the DFG Research Unit 1464 and the Strategic Japanese-German Joint Research Program from JST: ASPIMATT.",

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AU - Bracher, Thomas

AU - Heussner, Frank

AU - Serga, Alexander A.

AU - Naganuma, Hiroshi

AU - Mukaiyama, Koki

AU - Oogane, Mikihiko

AU - Ando, Yasuo

AU - Hillebrands, Burkard

AU - Pirro, Philipp

N1 - Funding Information: This work was supported in part by the DFG in the framework of the Research Unit TRR 173 “Spin+X” (Projects B01 and B04) and in part by the DFG Research Unit 1464 and the Strategic Japanese-German Joint Research Program from JST: ASPIMATT.

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N2 - We investigate the amplification of externally excited spin-waves via the spin-transfer-torque (STT) effect in combination with the spin-Hall effect (SHE) resulting from short current pulses. In the case of overcompensation of the spin-wave damping, a strong nonlinear shift of the spin-wave frequency spectrum occurs. In particular, this shift limits spin-wave amplification from the SHE-STT effect. However, it allows for the realization of a spin-wave switch. At the corresponding working point, efficient spin-wave excitation is possible only in the presence of the SHE-STT effect with a spin-wave intensity that is a factor of 20 larger than in the absence of the SHE-STT effect.

AB - We investigate the amplification of externally excited spin-waves via the spin-transfer-torque (STT) effect in combination with the spin-Hall effect (SHE) resulting from short current pulses. In the case of overcompensation of the spin-wave damping, a strong nonlinear shift of the spin-wave frequency spectrum occurs. In particular, this shift limits spin-wave amplification from the SHE-STT effect. However, it allows for the realization of a spin-wave switch. At the corresponding working point, efficient spin-wave excitation is possible only in the presence of the SHE-STT effect with a spin-wave intensity that is a factor of 20 larger than in the absence of the SHE-STT effect.

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KW - spin waves

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