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Nonlinear frequency and amplitude modulation of a nanocontact-based spin-torque oscillator

P. K. Muduli, Ye. Pogoryelov, S. Bonetti, G. Consolo, Fred Mancoff, and Johan Åkerman
Phys. Rev. B 81, 140408(R) – Published 28 April 2010

Abstract

We study the current-controlled modulation of a nanocontact spin-torque oscillator. Three principally different cases of frequency nonlinearity (d2f/dIdc2 being zero, positive, and negative) are investigated. Standard nonlinear frequency-modulation theory is able to accurately describe the frequency shifts during modulation. However, the power of the modulated sidebands only agrees with calculations based on a recent theory of combined nonlinear frequency and amplitude modulation.

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  • Received 15 October 2009

DOI:https://doi.org/10.1103/PhysRevB.81.140408

©2010 American Physical Society

Authors & Affiliations

P. K. Muduli*, Ye. Pogoryelov, and S. Bonetti

  • Materials Physics, Royal Institute of Technology, Electrum 229, 164 40 Kista, Sweden

G. Consolo

  • Department of Physics, University of Ferrara, 44100 Ferrara, Italy

Fred Mancoff

  • Everspin Technologies, Inc., 1300 N. Alma School Road, Chandler, Arizona 85224, USA

Johan Åkerman

  • Materials Physics, Royal Institute of Technology, Electrum 229, 164 40 Kista, Sweden and Physics Department, University of Gothenburg, 412 96 Gothenburg, Sweden

  • *muduli@kth.se

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Issue

Vol. 81, Iss. 14 — 1 April 2010

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