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

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

2009-10-15

arxiv.org/abs/0910.2819v3

Phys. Rev. B 81, 140408(R) (2010)

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.81.140408

We study the current controlled modulation of a nano-contact spin torque oscillator. Three principally different cases of frequency non-linearity ($d^{2}f/dI^{2}_{dc}$ 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.

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