CoFeB-Based Spin Hall Nano-Oscillators

Ranjbar, M., Durrenfeld, P., Haidar, M., Iacocca, Ezio, Balinskiy, M., Le, T. Q., Fazlali, M., Houshang, A., Awad, A. A., Dumas, R. K. and Akerman, J. (2014) CoFeB-Based Spin Hall Nano-Oscillators. IEEE Magnetics Letters, 5. p. 3000504. ISSN 1949-307X

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We demonstrate magnetization auto-oscillations driven by pure spin currents in spin Hall nano-oscillators based on CoFeB/Pt bilayers. Despite the very low anisotropic magnetoresistance of CoFeB, a substantial microwave signal power can be detected, even at room temperature, indicating that a sizable spin wave amplitude is generated. Spin torque ferromagnetic resonance measurements reveal that the generated auto-oscillation frequency lies below the ferromagnetic resonance frequency of CoFeB and is therefore well described by a self-localized spin wave bullet mode.

Item Type: Article
Uncontrolled Keywords: Spin Hall nano-oscillators, Spin torque ferromagnetic resonance, CoFeB
Subjects: F200 Materials Science
F300 Physics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 30 Sep 2019 15:43
Last Modified: 10 Oct 2019 14:46

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