Non-linear frequency and amplitude modulation of a nano-contact spin torque oscillator

Abstract

We study the current controlled modulation of a nano-contact spin torque oscillator. Three principally different cases of frequency non-linearity ($d^{2}f/d{I}_{dc}^2$ being zero, positive, and negative) are investigated. Standard non-linear 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 non-linear frequency and amplitude modulation.

4 pages, 4 figures

References in corpus (2)

• Large-amplitude coherent spin waves exited by spin-polarized current in nanoscale spin valves
• Time-Domain Studies of Very-Large-Angle Magnetization Dynamics Excited by Spin Transfer Torques

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