CoFeB-Based Spin Hall Nano-Oscillators
Artikel i vetenskaplig tidskrift, 2014
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.
Physics
MAGNETIZATION
EXCITATION
spin torque ferromagnetic resonance
PERPENDICULAR-ANISOTROPY
spin Hall nano-oscillators
Applied
DRIVEN
WAVES
EMISSION
CoFeB
Spin electronics
Författare
Mojtaba Ranjbar
Göteborgs universitet
Philipp Dürrenfeld
Göteborgs universitet
Mohammad Haidar
Göteborgs universitet
Ezio Iacocca
Göteborgs universitet
Michael Balinsky
Göteborgs universitet
T.Q. Le
Göteborgs universitet
M. Fazlali
Göteborgs universitet
Afshin Houshang
Göteborgs universitet
Ahmad Awad
Göteborgs universitet
Randy K. Dumas
Göteborgs universitet
Johan Åkerman
Göteborgs universitet
IEEE Magnetics Letters
1949-307X (ISSN)
Vol. 5 Article nr. 3000504-Ämneskategorier
Fysik
DOI
10.1109/lmag.2014.2375155