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Temperature dependence of spin-torque-driven self-oscillators

Published

Author(s)

William H. Rippard, Matthew R. Pufall, Thomas Cecil, Thomas J. Silva, Stephen E. Russek, M. L. Schneider

Abstract

We have measured the temperature dependence of spin-torque-driven self-oscillations in point-contact nanooscillators for both in-plane and out-of-plane applied fields. We find that the linewidth for both field geometries is qualitatively similar. In the absence of observable low-frequency noise, at high temperatures the linewidth decreases roughly linearly as the temperature decreases. However, extrapolation of the quasilinear region to a zero-temperature linewidth intercept can yield either a positive or negative value. This variation in the zero-temperature linewidth intercept indicates that a range of mechanisms must be involved in setting the linewidth. When 1/ f noise is present in the device power spectrum, the linewidth varies quasiexponentially with temperature. While the linewidth versus temperature behavior is similar for both in-plane and out-of-plane applied fields, their output power versus current variation with temperature is qualitatively different.
Citation
Physical Review B
Volume
80

Keywords

spin electronics, magnetic dynamics, nanomagetism

Citation

Rippard, W. , Pufall, M. , Cecil, T. , Silva, T. , Russek, S. and Schneider, M. (2009), Temperature dependence of spin-torque-driven self-oscillators, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902997 (Accessed April 20, 2024)
Created October 15, 2009, Updated February 19, 2017