Directional Spin Wave in Spin-Torque Oscillators Induced by Interfacial Dzyaloshinskii–Moriya Interaction

Wenqing Liu

doi:10.1109/LMAG.2017.2755587

Directional Spin Wave in Spin-Torque Oscillators Induced by Interfacial Dzyaloshinskii–Moriya Interaction

Wenqing Liu

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Abstract

Spin-torque oscillators (STOs) have tunable frequencies, low energy consumption, and high-quality factor compared to traditional oscillators. Here, we report the characteristics of nanocontact-STOs in the presence of interfacial Dzyaloshinskii–Moriya interaction (DMI) based on micromagnetic simulations. The DMI can decrease the STO frequency by about 2 GHz. More importantly, the DMI is able to break the isotropy of the spin-wave spectrum and turn the emitted microwave into directional spin-wave beams, potentially facilitating the synchronization of multiple STOs.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	IEEE Magnetic Letters
Volume	8
Early online date	21 Sept 2017
DOIs	https://doi.org/10.1109/LMAG.2017.2755587
Publication status	Published - 2017

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10.1109/LMAG.2017.2755587

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Cite this

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abstract = "Spin-torque oscillators (STOs) have tunable frequencies, low energy consumption, and high-quality factor compared to traditional oscillators. Here, we report the characteristics of nanocontact-STOs in the presence of interfacial Dzyaloshinskii–Moriya interaction (DMI) based on micromagnetic simulations. The DMI can decrease the STO frequency by about 2 GHz. More importantly, the DMI is able to break the isotropy of the spin-wave spectrum and turn the emitted microwave into directional spin-wave beams, potentially facilitating the synchronization of multiple STOs.",

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AB - Spin-torque oscillators (STOs) have tunable frequencies, low energy consumption, and high-quality factor compared to traditional oscillators. Here, we report the characteristics of nanocontact-STOs in the presence of interfacial Dzyaloshinskii–Moriya interaction (DMI) based on micromagnetic simulations. The DMI can decrease the STO frequency by about 2 GHz. More importantly, the DMI is able to break the isotropy of the spin-wave spectrum and turn the emitted microwave into directional spin-wave beams, potentially facilitating the synchronization of multiple STOs.

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