Experimental study of current-driven vortex oscillations in magnetic nanocontacts

T. Devolder; Joo-Von Kim; M. Manfrini; G. Hrkac; P. Crozat; L. Lagae; T. Schrefl; C. Chappert

doi:10.1117/12.826879

18 August 2009 Experimental study of current-driven vortex oscillations in magnetic nanocontacts

T. Devolder, Joo-Von Kim, M. Manfrini, G. Hrkac, P. Crozat, L. Lagae, T. Schrefl, C. Chappert

Proceedings Volume 7398, Spintronics II; 739808 (2009) https://doi.org/10.1117/12.826879
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

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.

Citation Download Citation

T. Devolder, Joo-Von Kim, M. Manfrini, G. Hrkac, P. Crozat, L. Lagae, T. Schrefl, and C. Chappert "Experimental study of current-driven vortex oscillations in magnetic nanocontacts", Proc. SPIE 7398, Spintronics II, 739808 (18 August 2009); https://doi.org/10.1117/12.826879

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