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

Journal article
Authors Pranaba Muduli Kishor
Yevgen Pogoryelov
Stefano Bonetti
Giancarlo Consolo
Fred Mancoff
Johan Åkerman
Published in Physical Review B
Volume 81
Issue 14
Pages 140408(R) (4 pages)
ISSN 1098-0121
Publication year 2010
Published at Department of Physics (GU)
Pages 140408(R) (4 pages)
Language en
Links prb.aps.org/abstract/PRB/v81/i14/e1...
Keywords spinntronik, magnetism
Subject categories Other electrical engineering, electronics and photonics, Electronics, Magnetism

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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