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Proceedings Paper

Experimental study of current-driven vortex oscillations in magnetic nanocontacts
Author(s): T. Devolder; Joo-Von Kim; M. Manfrini; G. Hrkac; P. Crozat; L. Lagae; T. Schrefl; C. Chappert
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Paper Abstract

The passage of spin-polarized currents through magnetic nanocontacts can lead to the excitation of self-sustained vortex oscillations in the free layer of a spin-valve stack. These oscillations involve the large amplitude translational motion of the vortex core about the contact region, with oscillation frequencies typically in the 200-500 MHz range. Here, we present a detailed experimental study of such current-driven vortex oscillations. In particular, we show that the oscillation mode is possible in zero applied magnetic field and is only stable within a range of in-plane applied fields.

Paper Details

Date Published: 18 August 2009
PDF: 11 pages
Proc. SPIE 7398, Spintronics II, 739808 (18 August 2009); doi: 10.1117/12.826879
Show Author Affiliations
T. Devolder, Institut d'Électronique Fondamentale, CNRS (France)
Univ. Paris-Sud (France)
Joo-Von Kim, Institut d'Électronique Fondamentale, CNRS (France)
Univ. Paris-Sud (France)
M. Manfrini, IMEC (Belgium)
G. Hrkac, Univ. of Sheffield (United Kingdom)
P. Crozat, Institut d'Électronique Fondamentale, CNRS (France)
Univ. Paris-Sud (France)
L. Lagae, IMEC (Belgium)
Katholieke Univ. Leuven (Belgium)
T. Schrefl, Univ. of Sheffield (United Kingdom)
St. Polten Univ. of Applied Science (Austria)
C. Chappert, Institut d'Electronique Fondamentale, CNRS (France)
Univ. Paris-Sud (France)

Published in SPIE Proceedings Vol. 7398:
Spintronics II
Manijeh Razeghi; Henri-Jean M. Drouhin; Jean-Eric Wegrowe, Editor(s)

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