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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
Keywords spinntronik, magnetism
Subject categories Other electrical engineering, electronics and photonics, Electronics, Magnetism


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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