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Proceedings Paper

Synchronization of high power vortex oscillators at multiple of the fundamental frequency
Author(s): Claire Baraduc; Sylvain Martin; Christophe Thirion; Yue Liu; Moris Dovek; Bernard Diény
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Paper Abstract

RF vortex spin-transfer oscillators based on low RA magnetic tunnel junctions were investigated. A very high power of excitations has been obtained characterized by a power spectral density containing a very sharp peak at the fundamental frequency and a series of harmonics. The observed behaviour is attributed to the combined effect of Oersted-Ampère field generated by the large applied dc-current and of the spin transfer torque. We furthermore show the synchronization of a vortex oscillation by applying a RF bias microwave which frequency is twice the oscillator fundamental frequency.

Paper Details

Date Published: 15 September 2011
PDF: 6 pages
Proc. SPIE 8100, Spintronics IV, 810016 (15 September 2011); doi: 10.1117/12.895216
Show Author Affiliations
Claire Baraduc, SPINTEC (France)
CEA-INAC/CNRS/UJF-Grenoble1 (France)
Sylvain Martin, SPINTEC (France)
CEA-INAC/CNRS/UJF-Grenoble1 (France)
Christophe Thirion, Institut NÉEL (France)
CNRS et Univ. Joseph Fourier (France)
Yue Liu, Headway Technologies, Inc. (United States)
Moris Dovek, Headway Technologies, Inc. (United States)
Bernard Diény, SPINTEC (France)
CEA-INAC/CNRS/UJF-Grenoble1 (France)

Published in SPIE Proceedings Vol. 8100:
Spintronics IV
Henri-Jean M. Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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