Multiple-mode excitation in spin-transfer nanocontacts with dynamic polarizer

Multiple-mode excitation in spin-transfer nanocontacts with dynamic polarizer

We report our study on the emission response of a magnetic nanocontact with dynamic polarizer in perpendicular magnetic field. In this configuration three modes are accessible, two of which correspond to the precessional motion of a vortex in one of the two ferromagnetic layers with the other workin...

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Bibliographic Details
Published in:Applied physics letters Vol. 98; no. 24; pp. 242506 - 242506-3
Main Authors: Wang, N., Wang, X. L., Qin, W., Yeung, S. H., Kwok, D. T. K., Wong, H. F., Xue, Q., Chu, P. K., Leung, C. W., Ruotolo, A.
Format: Journal Article
Language:English
Published: American Institute of Physics 13-06-2011
Online Access:Get full text
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Summary:We report our study on the emission response of a magnetic nanocontact with dynamic polarizer in perpendicular magnetic field. In this configuration three modes are accessible, two of which correspond to the precessional motion of a vortex in one of the two ferromagnetic layers with the other working as a static polarizer. At high currents a third mode can be observed that is ascribed to the simultaneous precession of two vortices, one in each layer, with the other layer working as a dynamic polarizer.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3600328