Magnetic Domain Wall Oscillator With Current-Perpendicular-to-Plane Geometry

By means of analytical 1-D model and full micromagnetic simulation, we investigated the magnetic domain wall (DW) oscillator with current-perpendicular-to-plane geometry. We found that the DW oscillation frequency linearly increases with the applying current density, but drops above a certain thresh...

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Veröffentlicht in:	IEEE transactions on magnetics 2011-10, Vol.47 (10), p.3085-3088
Hauptverfasser:	Seo, Soo-Man, Lee, Kyung-Jin
Format:	Artikel
Sprache:	eng
Schlagworte:	Analytical models Cross-disciplinary physics: materials science rheology Current-perpendicular-to-plane (CPP) geometry Exact sciences and technology Geometry magnetic domain wall (DW) Magnetic domain walls Magnetic domains Magnetic multilayers Magnetization Materials science micromagnetic simulation Oscillators Other topics in materials science Physics spin-transfer torque (STT)
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Beschreibung
Zusammenfassung:	By means of analytical 1-D model and full micromagnetic simulation, we investigated the magnetic domain wall (DW) oscillator with current-perpendicular-to-plane geometry. We found that the DW oscillation frequency linearly increases with the applying current density, but drops above a certain threshold. This frequency drop is caused by the deformation of DW due to spin-transfer torque. We found that by applying an external perpendicular magnetic field in addition to the current, this deformation and the frequency drop can be suppressed, which allows obtaining a reliable frequency range for the device application.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/TMAG.2011.2158398