Long-range mutual synchronization of spin Hall nano-oscillators

Ahmad A. Awad; Philipp Dürrenfeld; A. Houshang; Mykola Dvornik; Ezio Iacocca; Randy K. Dumas; Johan Åkerman

doi:10.1038/NPHYS3927

Long-range mutual synchronization of spin Hall nano-oscillators

Ahmad A. Awad, Philipp Dürrenfeld, A. Houshang, Mykola Dvornik, Ezio Iacocca, Randy K. Dumas, Johan Åkerman

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

235 Citations (Scopus)

133 Downloads (Pure)

Abstract

The spin Hall effect in a non-magnetic metal with spin–orbit coupling injects transverse spin currents into adjacent magnetic layers, where the resulting spin transfer torque can drive spin wave auto-oscillations. Such spin Hall nano-oscillators (SHNOs) hold great promise as extremely compact and broadband microwave signal generators and magnonic spin wave injectors. Here we show that SHNOs can also be mutually synchronized with unprecedented efficiency. We demonstrate mutual synchronization of up to nine individual SHNOs, each separated by 300 nm. Through further tailoring of the connection regions we can extend the synchronization range to 4 μm. The mutual synchronization is observed electrically as an increase in the power and coherence of the microwave signal, and confirmed optically using micro-Brillouin light scattering microscopy as two spin wave regions sharing the same spectral content, in agreement with our micromagnetic simulations.

Original language	English
Pages (from-to)	292-299
Journal	Nature Physics
Volume	13
Issue number	3
Early online date	14 Nov 2016
DOIs	https://doi.org/10.1038/NPHYS3927
Publication status	Published - Mar 2017
Externally published	Yes

Access to Document

10.1038/NPHYS3927

Awad et al - Long-range mutual synchronization of spin Hall nano-oscillators AAMAccepted author manuscript, 1.16 MB

Cite this

@article{f5a0e96a41a147838adc0fe87d029a65,

title = "Long-range mutual synchronization of spin Hall nano-oscillators",

abstract = "The spin Hall effect in a non-magnetic metal with spin–orbit coupling injects transverse spin currents into adjacent magnetic layers, where the resulting spin transfer torque can drive spin wave auto-oscillations. Such spin Hall nano-oscillators (SHNOs) hold great promise as extremely compact and broadband microwave signal generators and magnonic spin wave injectors. Here we show that SHNOs can also be mutually synchronized with unprecedented efficiency. We demonstrate mutual synchronization of up to nine individual SHNOs, each separated by 300 nm. Through further tailoring of the connection regions we can extend the synchronization range to 4 μm. The mutual synchronization is observed electrically as an increase in the power and coherence of the microwave signal, and confirmed optically using micro-Brillouin light scattering microscopy as two spin wave regions sharing the same spectral content, in agreement with our micromagnetic simulations.",

author = "Awad, {Ahmad A.} and Philipp D{\"u}rrenfeld and A. Houshang and Mykola Dvornik and Ezio Iacocca and Dumas, {Randy K.} and Johan {\AA}kerman",

year = "2017",

month = mar,

doi = "10.1038/NPHYS3927",

language = "English",

volume = "13",

pages = "292--299",

journal = "Nature Physics",

issn = "1745-2473",

publisher = "Nature Publishing Group",

number = "3",

}

TY - JOUR

T1 - Long-range mutual synchronization of spin Hall nano-oscillators

AU - Awad, Ahmad A.

AU - Dürrenfeld, Philipp

AU - Houshang, A.

AU - Dvornik, Mykola

AU - Iacocca, Ezio

AU - Dumas, Randy K.

AU - Åkerman, Johan

PY - 2017/3

Y1 - 2017/3

N2 - The spin Hall effect in a non-magnetic metal with spin–orbit coupling injects transverse spin currents into adjacent magnetic layers, where the resulting spin transfer torque can drive spin wave auto-oscillations. Such spin Hall nano-oscillators (SHNOs) hold great promise as extremely compact and broadband microwave signal generators and magnonic spin wave injectors. Here we show that SHNOs can also be mutually synchronized with unprecedented efficiency. We demonstrate mutual synchronization of up to nine individual SHNOs, each separated by 300 nm. Through further tailoring of the connection regions we can extend the synchronization range to 4 μm. The mutual synchronization is observed electrically as an increase in the power and coherence of the microwave signal, and confirmed optically using micro-Brillouin light scattering microscopy as two spin wave regions sharing the same spectral content, in agreement with our micromagnetic simulations.

AB - The spin Hall effect in a non-magnetic metal with spin–orbit coupling injects transverse spin currents into adjacent magnetic layers, where the resulting spin transfer torque can drive spin wave auto-oscillations. Such spin Hall nano-oscillators (SHNOs) hold great promise as extremely compact and broadband microwave signal generators and magnonic spin wave injectors. Here we show that SHNOs can also be mutually synchronized with unprecedented efficiency. We demonstrate mutual synchronization of up to nine individual SHNOs, each separated by 300 nm. Through further tailoring of the connection regions we can extend the synchronization range to 4 μm. The mutual synchronization is observed electrically as an increase in the power and coherence of the microwave signal, and confirmed optically using micro-Brillouin light scattering microscopy as two spin wave regions sharing the same spectral content, in agreement with our micromagnetic simulations.

U2 - 10.1038/NPHYS3927

DO - 10.1038/NPHYS3927

M3 - Article

SN - 1745-2473

VL - 13

SP - 292

EP - 299

JO - Nature Physics

JF - Nature Physics

IS - 3

ER -

Long-range mutual synchronization of spin Hall nano-oscillators

Abstract

Access to Document

Fingerprint

Cite this