Title :
Triple mode-jumping in a spin torque oscillator
Author :
Eklund, Anders J. ; Sani, S.R. ; Mohseni, S.M. ; Persson, Johannes ; Malm, B. Gunnar ; Akerman, J.
Author_Institution :
Sch. of Inf. & Commun. Technol., KTH R. Inst. of Technol., Kista, Sweden
Abstract :
In a nano-contact Co/Cu/NiFe spin torque oscillator, mode-jumping between up to three frequencies within 22.5-24.0 GHz is electrically observed in the time domain. The measurements reveal toggling between two states with differing oscillation amplitude, of which the low-amplitude state is further divided into two rapidly alternating modes. Analysis of the mode dwell time statistics and the total time spent in each mode is carried out, and it is found that in both aspects the balance between the modes is greatly altered with the DC drive current.
Keywords :
Permalloy; cobalt; copper; oscillators; torque; Co-Cu-NiFe; DC drive current; frequency 22.5 GHz to 24.0 GHz; low-amplitude state; mode dwell time statistics; nanocontact spin torque oscillator; oscillation amplitude; time-domain analysis; triple mode-jumping; Magnetic resonance; Oscillators; Radio frequency; Time-domain analysis; Time-frequency analysis; Torque;
Conference_Titel :
Noise and Fluctuations (ICNF), 2013 22nd International Conference on
Conference_Location :
Montpellier
Print_ISBN :
978-1-4799-0668-0
DOI :
10.1109/ICNF.2013.6578965
