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