Keller, M.
, Kos, A.
, Silva, T.
, Rippard, W.
and Pufall, M.
(2009),
Time domain measurement of phase noise in a spin torque oscillator, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=901711
(Accessed March 13, 2025)
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Time domain measurement of phase noise in a spin torque oscillator
Published
Author(s)
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Abstract
We measure phase noise from the zero crossings of the voltage vs. time waveform of a spin torque nanocontact oscillating in a vortex mode. The power spectrum of the phase noise varies with Fourier frequency f as 1/f2, consistent with frequency fluctuations driven by a thermal source. We compare the linewidth due to phase noise with that measured using a spectrum analyzer. A phase-locked loop reduces the phase noise for frequencies within its 3 MHz bandwidth.Citation
Applied Physics Letters
Volume
94
Pub Type
Journals
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Keywords
spin torque, phase noise, phase-locked loop
Citation
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Created May 13, 2009, Updated February 19, 2017