Charge pumping and the colored thermal voltage noise in spin valves

Journal article (2009)
Department
Kavli Institute of Nanoscience (AS) (TU Delft)
Copyright: © 2009 The Authors ; American Physical Society
DOI: https://doi.org/doi:10.1103/PhysRevB.79.174415
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Published Date

12-05-2009

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Source:

Physical Review B, 79 (17), 2009

ISSN:

0163-1829

Faculty

Applied Sciences

Department

Kavli Institute of Nanoscience

Abstract

Spin pumping by a moving magnetization gives rise to an electric voltage over a spin valve. Thermal fluctuations of the magnetization manifest themselves as increased thermal voltage noise with absorption lines at the ferromagnetic resonance frequency and/or zero frequency. The effect depends on the magnetization configuration and can be of the same order of magnitude as the Johnson-Nyquist thermal noise. Measuring colored voltage noise is an alternative to ferromagnetic resonance experiments for nanoscale ferromagnetic circuits.

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