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PUBLICATIONS

Time domain measurement of phase noise in a spin torque oscillator

Published

Author(s)

Mark W. Keller, Anthony B. Kos, Thomas J. Silva, William H. Rippard, Matthew R. Pufall

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
Physics and Condensed matter

Citation

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 April 24, 2024)

Created May 13, 2009, Updated February 19, 2017