Volume 87, Number 5, September 2009
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||16 September 2009|
Auto-oscillation threshold and line narrowing in MgO-based spin-torque oscillators
IMEC - Kapeldreef 75, B-3001 Leuven, Belgium, EU
2 Institut d'Electronique Fondamentale, CNRS, UMR 8622 - 91405 Orsay, France, EU
3 Université Paris-Sud - 91405 Orsay, France, EU
4 Department of Engineering Materials, University of Sheffield - Sheffield S1 4DU, UK, EU
Corresponding author: email@example.com
Accepted: 17 August 2009
We present an experimental study of the power spectrum of current-driven magnetization oscillations in MgO tunnel junctions under low bias. We find the existence of narrow spectral lines, down to 8 MHz in width at a frequency of 10.7 GHz, for small applied fields with clear evidence of an auto-oscillation threshold. Micromagnetics simulations indicate that the excited mode corresponds to an edge mode of the synthetic antiferromagnet.
PACS: 75.75.+a – Magnetic properties of nanostructures / 72.25.Pn – Current-driven spin pumping / 85.75.-d – Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.