Temperature dependence of spin-torque-driven self-oscillators

Published

October 15, 2009

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

Pub Type

Journals

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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 December 8, 2024)